<PAGE>

                                   FORM 10-Q

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

(Mark One)
[X] Quarterly report pursuant to Section 13 or 15(d) of the Securities  Exchange
    Act of 1934
For the quarterly  period ended June 30, 1999
                                -------------

[ ] Transition report pursuant to Section 13 or 15(d) of the Securities Exchange
    Act of 1934
For the transition period from            to
                               -----------   ----------
                        Commission File Number: 0-16939

                 JONES SPACELINK INCOME/GROWTH FUND 1-A, LTD.
--------------------------------------------------------------------------------
               Exact name of registrant as specified in charter


Colorado                                                              84-1069504
--------------------------------------------------------------------------------
State of organization                                        IRS employer I.D. #

                            c/o Comcast Corporation
                1500 Market Street, Philadelphia, PA 19102-2148
                -----------------------------------------------
                     Address of principal executive office

                                (215) 665-1700
                         -----------------------------
                         Registrant's telephone number


Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

Yes   X                                                                No
    -----                                                                 -----

<PAGE>

                 JONES SPACELINK INCOME/GROWTH FUND 1-A, LTD.
                 --------------------------------------------
                            (A Limited Partnership)

                           UNAUDITED BALANCE SHEETS
                           ------------------------
<TABLE>
<CAPTION>
                                                                                    June 30,             December 31,
                                                                                      1999                   1998
                                                                                  ------------          -------------
                                     ASSETS
                                     ------
<S>                                                                               <C>
Proceeds from sale in escrow                                                      $  1,045,000          $   1,000,000
                                                                                  ------------          -------------

         Total assets                                                             $  1,045,000          $   1,000,000
                                                                                  ============          =============


           LIABILITIES AND PARTNERS' CAPITAL
           ---------------------------------

LIABILITIES:
  Accounts payable and accrued liabilities                                        $    111,897          $     135,696
                                                                                  ------------          -------------

         Total liabilities                                                             111,897                135,696
                                                                                  ------------          -------------

PARTNERS' CAPITAL:
  General Partner-
    Contributed capital                                                                  1,000                  1,000
    Distributions                                                                     (103,950)              (103,950)
    Accumulated earnings                                                               102,950                102,950
                                                                                  ------------          -------------

                                                                                        -                      -
                                                                                  ------------          -------------

  Limited Partners-
    Contributed capital, net of
      related commissions, syndication
      costs and interest (51,276 units
      outstanding at June 30, 1999
      and December 31, 1998)                                                        21,875,852             21,875,852
    Distributions                                                                  (30,206,680)           (30,206,680)
    Accumulated earnings                                                             9,263,931              9,195,132
                                                                                  ------------          -------------

                                                                                       933,103                864,304
                                                                                  ------------           ------------

         Total liabilities and partners' capital                                   $ 1,045,000           $  1,000,000
                                                                                   ===========           ============
</TABLE>

            The accompanying notes to unaudited financial statements
             are an integral part of these unaudited balance sheets.

                                       2
<PAGE>

                 JONES SPACELINK INCOME/GROWTH FUND 1-A, LTD.
                 --------------------------------------------
                            (A Limited Partnership)

                      UNAUDITED STATEMENTS OF OPERATIONS
                      ----------------------------------
<TABLE>
<CAPTION>
                                                      For the Three Months                  For the Six Months
                                                         Ended June 30,                       Ended June 30,
                                                   -------------------------           ---------------------------
                                                       1999          1998                 1999             1998
                                                   -----------   -----------           -----------     -----------
<S>                                                <C>           <C>                   <C>             <C>
REVENUES                                           $    -        $ 1,470,503           $    -          $ 2,919,556

COSTS AND EXPENSES:
  Operating expenses                                    -            992,930                -            1,747,814
  Management fees and allocated administrative
    costs from the General Partner                      -            168,979                -              327,809
  Depreciation and amortization                         -            451,697                -              893,029
                                                   -----------   -----------           -----------     -----------

OPERATING LOSS                                          -           (143,103)               -              (49,096)
                                                   -----------   -----------           -----------     -----------

OTHER INCOME (EXPENSE):
  Interest expense                                      (2,497)     (132,767)               (4,662)       (288,157)
  Interest income on escrowed proceeds                  11,250        -                     22,500          -
  Gain on sale of cable television system               -         13,106,602                -           13,106,602
  Other, net                                            66,294        (8,323)               50,961          (3,636)
                                                   -----------   -----------           -----------     -----------

         Total other income (expense), net              75,047    12,965,512                68,799      12,814,809
                                                   -----------   -----------           -----------     -----------

NET INCOME                                         $    75,047   $12,822,409           $    68,799     $12,765,713
                                                   ===========   ===========           ===========     ===========

ALLOCATION OF NET INCOME:
  General Partner                                  $    -        $    17,825           $    -          $    17,258
                                                   ===========   ===========           ===========     ===========

  Limited Partners                                 $    75,047   $12,804,584           $    68,799     $12,748,455
                                                   ===========   ===========           ===========     ===========

NET INCOME PER LIMITED
  PARTNERSHIP UNIT                                 $      1.46   $    249.71           $      1.34     $    248.62
                                                   ===========   ===========           ===========     ===========

WEIGHTED AVERAGE NUMBER OF
  LIMITED PARTNERSHIP UNITS
  OUTSTANDING                                           51,276        51,276                51,276          51,276
                                                   ===========   ===========           ===========     ===========
</TABLE>

            The accompanying notes to unaudited financial statements
               are an integral part of these unaudited statements.

                                       3
<PAGE>

                 JONES SPACELINK INCOME/GROWTH FUND 1-A, LTD.
                 --------------------------------------------
                            (A Limited Partnership)

                      UNAUDITED STATEMENTS OF CASH FLOWS
                      ----------------------------------
<TABLE>
<CAPTION>
                                                                                          For the Six Months
                                                                                             Ended June 30,
                                                                                   --------------------------------
                                                                                         1999               1998
                                                                                   ------------        ------------
<S>                                                                                <C>                 <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
    Net income                                                                     $     68,799        $ 12,765,713
    Adjustments to reconcile net income to net cash
      provided by operating activities:
        Depreciation and amortization                                                    -                  893,029
        Gain on sale of cable television system                                          -              (13,106,602)
        Decrease in trade receivables, net                                               -                  182,946
        Increase in deposits, prepaid expenses and other assets                         (45,000)           (163,568)
        Decrease in accounts payable and accrued liabilities and
          subscriber prepayments and deposits                                           (23,799)           (163,541)
                                                                                   ------------        ------------

         Net cash provided by operating activities                                       -                  407,977
                                                                                   ------------        ------------

CASH FLOWS FROM INVESTING ACTIVITIES:
    Purchase of property and equipment, net                                              -                 (386,202)
    Proceeds from sale of cable television system, net of escrow                         -               22,378,451
                                                                                   ------------        ------------

         Net cash provided by investing activities                                       -               21,992,249
                                                                                   ------------        ------------

CASH FLOWS FROM FINANCING ACTIVITIES:
    Repayment of borrowings                                                              -               (7,620,042)
    Increase in accrued distributions                                                    -               14,915,500
    Distribution to limited partners                                                     -              (14,915,500)
                                                                                   ------------         -----------

         Net cash used in financing activities                                           -               (7,620,042)
                                                                                   ------------        ------------


Increase in cash                                                                         -               14,780,184

Cash, beginning of period                                                                -                  146,657
                                                                                   ------------        ------------

Cash, end of period                                                                $     -             $ 14,926,841
                                                                                   ============        ============

SUPPLEMENTAL CASH FLOW DISCLOSURE:
  Interest paid                                                                    $     -             $    326,494
                                                                                   ============        ============
</TABLE>

            The accompanying notes to unaudited financial statements
               are an integral part of these unaudited statements.

                                       4
<PAGE>

                 JONES SPACELINK INCOME/GROWTH FUND 1-A, LTD.
                 --------------------------------------------
                            (A Limited Partnership)

                    NOTES TO UNAUDITED FINANCIAL STATEMENTS
                    ---------------------------------------

(1)  This Form 10-Q is being filed in conformity with the SEC requirements for
unaudited financial statements and does not contain all of the necessary
footnote disclosures required for a complete presentation of the Balance Sheets
and Statements of Operations and Cash Flows in conformity with generally
accepted accounting principles. However, in the opinion of management, this data
includes all adjustments, consisting only of normal recurring accruals,
necessary to present fairly the financial position of Jones Spacelink
Income/Growth Fund 1-A, Ltd. (the "Partnership") at June 30, 1999 and December
31, 1998 and its results of operations for the three and six month periods ended
June 30, 1999 and 1998 and its cash flows for the six month periods ended June
30, 1999 and 1998.

     The Partnership owned and operated the cable television systems serving the
areas in and around the communities of Bluffton, Decatur, Monroe, Auburn,
Butler, Uniondale, Waterloo, Poneto, Vera Cruz and Garrett, and portions of the
unincorporated areas of Wells, Allen, Noble, Adams and DeKalb Counties, all in
the State of Indiana (the "Northeast Indiana Systems") until they were sold on
June 30, 1998. Jones Intercable, Inc., a publicly held Colorado corporation, is
the "General Partner" and manages the Partnership.

     On April 7, 1999, Comcast Corporation ("Comcast") completed the acquisition
of a controlling interest in the General Partner. As of April 7, 1999, Comcast
owned approximately 12.8 million shares of the General Partner's Class A Common
Stock and approximately 2.9 million shares of the General Partner's Common
Stock, representing approximately 37% of the economic interest and 47% of the
voting interest in the General Partner. Also on that date, Comcast contributed
its shares in the General Partner to Comcast's wholly owned subsidiary, Comcast
Cable Communications, Inc. ("Comcast Cable"). The approximately 2.9 million
shares of Common Stock of the General Partner owned by Comcast represents
approximately 57% of the outstanding Common Stock, which class of stock is
entitled to elect 75% of the Board of Directors of the General Partner. As a
result of this transaction, the General Partner is now a consolidated public
company subsidiary of Comcast Cable.

     Also on April 7, 1999, the bylaws of the General Partner were amended to
establish the size of the General Partner's Board of Directors as a range from
eight to thirteen directors and the board was reconstituted so as to have eight
directors and the following directors of the General Partner resigned: Robert E.
Cole, Josef J. Fridman, James J. Krejci, James B. O'Brien, Raphael M. Solot,
Robert Kearney, Howard O. Thrall, Siim Vanaselja, Sanford Zisman and Glenn R.
Jones. In addition, Donald L. Jacobs resigned as a director elected by the
holders of Class A Common Stock and was elected by the remaining directors as a
director elected by the holders of Common Stock. The remaining directors elected
the following persons to fill the vacancies on the board created by such
resignations: Ralph J. Roberts, Brian L. Roberts, John R. Alchin, Stanley Wang
and Lawrence S. Smith. All of the newly elected directors, with the exception of
Mr. Jacobs, are officers of Comcast. Also on April 7, 1999, the following
executive officers of the General Partner resigned: Glenn R. Jones, James B.
O'Brien, Ruth E. Warren, Kevin P. Coyle, Cynthia A. Winning, Elizabeth M.
Steele, Wayne H. Davis and Larry W. Kaschinske. The following persons were
appointed as executive officers of the General Partner on April 7, 1999: Ralph
J. Roberts, Brian L. Roberts, Lawrence S. Smith, John R. Alchin and Stanley
Wang.

     Comcast is principally engaged in the development, management and
operation of broadband cable networks and in the provision of content through
programming investments. Comcast Cable is principally engaged in the
development, management and operation of broadband cable networks. The address
of Comcast's principal office is 1500 Market Street, Philadelphia, Pennsylvania
19102-2148, which is also now the address of the General Partner's principal
office. The address of Comcast Cable's principal office is 1201 Market Street,
Suite 2201, Wilmington, Delaware 19801.

(2)  On June 30, 1998, the Partnership sold the Northeast Indiana Systems, its
only remaining operating assets, to an unaffiliated party for a sales price of
$23,500,000. From the sale proceeds, the Partnership repaid all of its
indebtedness, settled working capital adjustments, deposited $1,000,000 into an
interest-bearing indemnity escrow account and distributed remaining net sale
proceeds to its limited partners.

     For a period of one year following the closing date, $1,000,000 of the sale
proceeds remained in escrow as security for the Partnership's agreement to
indemnify the buyer under the asset purchase agreement. The escrow period
expired on June 30, 1999, and no claims were made on the escrowed funds by the
buyer. From the escrowed funds, the Partnership will pay its remaining
liabilities, which totaled $111,897 at June 30, 1999, and it will hold the
balance to cover the expenses of the Partnership until the Partnership is
liquidated and dissolved. It will distribute any remaining balance to the
Partnership's limited partners only after the pending litigation in which the
Partnership is a named defendant has been resolved and terminated (See Part II,
Item 1).

     Although the sale of the Northeast Indiana Systems represented the sale of
the only remaining operating assets of the Partnership, the Partnership will not
be dissolved until the pending litigation in which the Partnership is a named
defendant has been resolved and terminated.

(3)  The General Partner manages the Partnership and received a fee for its
services equal to 5 percent of the gross revenues of the Partnership, excluding
revenues from the sale of cable television systems or franchises. Management
fees paid to the General Partner by the Partnership for the three and six month
periods ended June 30, 1998 were $73,525 and $145,978, respectively. The General
Partner has not received and will not receive a management fee after June 30,
1998.

     The Partnership will continue to reimburse the General Partner and certain
of its subsidiaries for certain administrative expenses. These expenses
represent the salaries and related benefits paid for corporate personnel. Such
personnel provide administrative, accounting, tax, legal, and investor relations
services to the Partnership. Such services, and their related costs, are
necessary to the administration of the Partnership. Reimbursements made to the
General Partner by the Partnership for overhead and administrative expenses for
the three and six month periods ended June 30, 1999 were $101 and $201,
respectively, compared to $95,454 and $181,831, respectively, for the similar
1998 periods.

                                       5
<PAGE>

                 JONES SPACELINK INCOME/GROWTH FUND 1-A, LTD.
                 --------------------------------------------
                            (A Limited Partnership)

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ---------------------------------------
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                 ---------------------------------------------


FINANCIAL CONDITION
-------------------

     On June 30, 1998, the Partnership sold the Northeast Indiana Systems, its
only remaining operating assets, to an unaffiliated party for a sales price of
$23,500,000. From the sale proceeds, the Partnership repaid all of its
indebtedness, settled working capital adjustments, deposited $1,000,000 into an
interest-bearing indemnity escrow account and distributed remaining net sale
proceeds to its limited partners.

     For a period of one year following the closing date, $1,000,000 of the sale
proceeds remained in escrow as security for the Partnership's agreement to
indemnify the buyer under the asset purchase agreement. The escrow period
expired on June 30, 1999, and no claims were made on the escrowed funds by the
buyer. From the escrowed funds, the Partnership will pay its remaining
liabilities, which totaled $111,897 at June 30, 1999, and it will hold the
balance to cover the expenses of the Partnership until the Partnership is
liquidated and dissolved. It will distribute any remaining balance to the
Partnership's limited partners only after the pending litigation in which the
Partnership is a named defendant has been resolved and terminated (See Part II,
Item 1).

     Although the sale of the Northeast Indiana Systems represented the sale of
the only remaining operating assets of the Partnership, the Partnership will not
be dissolved until the pending litigation in which the Partnership is a named
defendant has been resolved and terminated.

     Because the Partnership has sold all of its assets and further
distributions, if any, will be made to the limited partners of record as of the
closing date of the sale of the Partnership's last remaining cable television
system, new limited partners would not be entitled to any distributions from the
Partnership and transfers of limited partnership interests would have no
economic or practical value. The General Partner therefore has determined, in
accordance with the authority granted to it under Section 3.5 of the
Partnership's limited partnership agreement, that it will not process any
transfers of limited partnership interests in the Partnership during the
remainder of the Partnership's term.

RESULTS OF OPERATIONS
---------------------

     Due to the Northeast Indiana Systems sale on June 30, 1998, which were the
Partnership's last remaining operating assets, a discussion of the results of
operations would not be meaningful.

                                       6
<PAGE>

                          PART II - OTHER INFORMATION


Item 1.  Legal Proceedings

         In July 1999, the General Partner,  each of its subsidiaries that serve
as general  partners  of managed  public  partnerships  and most of its  managed
public partnerships,  including the Partnership, were named defendants in a case
styled Everest Cable Investors, LLC, Everest Properties, LLC, Everest Properties
       -------------------------------------------------------------------------
II, LLC and KM Investments,  LLC, plaintiffs v. Jones Intercable,  Inc., et al.,
--------------------------------------------------------------------------------
defendants  (Superior Court, Los Angeles County,  State of California,  Case No.
----------
C213638).  Plaintiffs,  all of which are affiliated with each other,  are in the
business of, among other things,  investing in limited partnerships that own and
operate cable television  systems.  Plaintiffs allege that one of the plaintiffs
has been a limited  partner  or has  obtained a valid  power-of-attorney  from a
limited partner in each of the General Partner's managed public partnerships and
that they had formed a coordinated plan amongst themselves to acquire up to 4.9%
of the limited  partnership  interests in each of the General  Partner's managed
public  partnerships  during  the  latter  half of 1996.  Plaintiffs'  complaint
alleges  that they were  frustrated  in this  purpose by the  General  Partner's
refusal  to provide  plaintiffs  with  lists of the names and  addresses  of the
limited  partners of the General  Partner's  managed  public  partnerships.  The
complaint  alleges that the General  Partner's  actions  constituted a breach of
contract,  a breach of the General  Partner's implied covenant of good faith and
fair dealing owed to the plaintiffs as limited partners, a breach of the General
Partner's fiduciary duty owed to the plaintiffs as limited partners and tortious
interference  with prospective  economic  advantage.  Plaintiffs allege that the
General  Partner's  failure to provide them with the partnership lists prevented
them from making their  tender  offers and the  plaintiffs  claim that they have
been  injured  by such  action in an amount to be proved at trial,  but not less
than $17 million. Given the fact that this case was only recently filed and that
the  time  for the  General  Partner's  response  to the  complaint  has not yet
expired,  the  General  Partner has not yet  responded  to this  complaint.  The
General Partner believes,  however,  that it and the defendant  subsidiaries and
managed public  partnerships have defenses to the plaintiffs' claims for relief,
and the General  Partner  intends to defend this lawsuit  vigorously both on its
own  behalf  and  on  behalf  of  its   subsidiaries   and  its  managed  public
partnerships.

Item 6.  Exhibits and Reports on Form 8-K

         a)  Exhibits

             27) Financial Data Schedule

         b)  Reports on Form 8-K

                  Report on Form 8-K  dated  April 7,  1999,  filed on April 15,
1999,  reported  that on  April  7,  1999,  Comcast  Corporation  completed  the
acquisition of a controlling interest in the General Partner.

                                       7
<PAGE>

                                  SIGNATURES


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                JONES SPACELINK INCOME/GROWTH FUND 1-A, LTD.
                                BY:  JONES INTERCABLE, INC.
                                     General Partner



                                By:  /S/ Lawrence S. Smith
                                     -------------------------------------------
                                     Lawrence S. Smith
                                     Principal Accounting Officer


                                By:  /S/ Joseph J. Euteneuer
                                     -------------------------------------------
                                     Joseph J. Euteneuer
                                     Vice President (Authorized Officer)



Dated:  August 16, 1999

                                       8