Exhibit 10.7


                                   GUARANTY
                                   --------

      This  Guaranty  ("Guaranty")  is  made   as  of  March  15,  1999,   by
 Performance Interconnect Corp.,  a Texas corporation  (the "Guarantor"),  in
 favor of  PC  DYNAMICS CORPORATION,  a  Texas corporation  ("PC  Dynamics").
 Unless otherwise defined  herein, capitalized terms  used herein shall  have
 the meanings ascribed to them in the Note referred to below.

                               WITNESSETH THAT:

      WHEREAS,  PC  Dynamics  and  PC  DYNAMICS  OF  TEXAS,  INC.,  a   Texas
 corporation ("BUYER") have entered into that  certain Agreement dated as  of
 March 15, 1999 pursuant to which BUYER has agreed to purchase certain Assets
 from PC Dynamics related to the manufacturing of printed circuit boards (the
 "Agreement");

      WHEREAS, part of  consideration paid by  BUYER for the  Assets was  the
 execution by  BUYER of  a promissory  note  payable to  PC Dynamics  in  the
 principal amount of $723,479 and a promissory note payable to PC Dynamics in
 the principal amount of $293,025 (collectively, the "Notes");

      WHEREAS, Guarantor  is the  owner  of all  of the  outstanding  capital
 stock of BUYER, and will derive substantial benefit from BUYER's purchase of
 the Assets  and  the  acceptance by  PC  Dynamics  of the  Note  as  partial
 consideration therefore; and

      WHEREAS, PC  Dynamics has  required  as a  condition among  others,  to
 accepting the  Notes  as  partial consideration  for  the  Assets  that  the
 Guarantor execute and deliver this Guaranty to PC Dynamics.

      NOW, THEREFORE, for  and in consideration of  the foregoing and of  any
 financial  accommodations  or  extensions  of  credit  heretofore,  now   or
 hereafter made to or for the benefit of  BUYER by PC Dynamics and for  other
 good and valuable consideration,  the receipt and  sufficiency of which  are
 hereby acknowledged, Guarantor hereby agrees as follows:

      1. Guarantor absolutely, unconditionally and irrevocably guarantees  to
 PC Dynamics the full and prompt payment of the principal of and interest  on
 the  Notes  when  due,  whether  upon  demand,  at  stated  maturity,   upon
 acceleration or  otherwise, and  at all  times  thereafter, and  the  prompt
 payment of all sums which may now be  or may hereafter become due and  owing
 under the Note,  the Agreement and  this Guaranty, and  the other  documents
 delivered  in  connection   therewith  (collectively,  the   "Obligations"),
 regardless of any standstill agreement or other prohibition relating to such
 payment.   Guarantor  hereby  agrees  that  this  Guaranty  is  an  absolute
 guarantee of payment and performance and is not a guaranty of collection.
<PAGE>
      2. In the event BUYER at any time fails to observe, perform or  satisfy
 the Obligations, Guarantor  agrees, on demand  by PC  DYNAMICS, to  promptly
 pay, perform and satisfy  the Obligations.  Guarantor  shall also pay to  PC
 Dynamics, on demand and in immediately available funds, (a) all fees,  costs
 and expenses (including, without limitation, all court costs and  attorneys'
 and paralegals' fees, costs  and expenses) paid or  incurred by PC  Dynamics
 in: (i) endeavoring to collect all or  any part of the Obligations from,  or
 in  prosecuting  any  action   against,  Guarantor;  and  (ii)   preserving,
 protecting or defending the  enforceability of this  Guaranty or its  rights
 hereunder (all such costs and expenses hereinafter collectively referred  to
 as the "Expenses"); and (b) interest on such obligations of Guarantor  under
 this Guaranty from  the date of  demand until paid  in full at  the rate  of
 interest applicable to overdue principal and interest described in paragraph
 1 of the Note.

       3.  Guarantor hereby agrees that  his obligations under this  Guaranty
 shall be unconditional, irrespective of

           (a)  the enforceability, avoidance or subordination of any of the
      Obligations;

           (b) the absence of any attempt by, or on behalf of, PC Dynamics to
      collect, or take any other  action to enforce, all  or any part of  the
      Obligations from BUYER or from any  other guarantor of all or any  part
      or the Obligations or any other person or entity;

           (c) the election  of any remedy  by, or an  behalf of, PC Dynamics
      with respect to all or any part of the Obligations;

           (d) the waiver, consent, extension, forbearance or granting of any
      indulgence  by, or  on  behalf of,  PC  Dynamics with  respect  to  any
      provision of the Agreement, the Note or this Guaranty;

           (e) the failure  of PC Dynamics  to take any  steps to perfect and
      maintain its security interest in, or to preserve its respective  right
      to any  collateral or security  now or hereafter  given to PC  Dynamics
      for all or any part of the Obligations (the "Collateral");

           (f) the election  by,  or  an  behalf  of,  PC  Dynamics,  in  any
      proceeding instituted  under  the United  States Bankruptcy  Code  (the
      "Bankruptcy Code")  of the  application of  Section 1111(b)(2)  of  the
      Bankruptcy Code;

           (g) any borrowing  or grant of  a security interest  by BUYER,  as
      debtor-in-possession, under Section 364 of the Bankruptcy Code;
<PAGE>
           (h) the disallowance  under Section 502 of  the Bankruptcy Code of
      all or any portion  of the claims of PC  Dynamics for repayment of  all
      or any part of the Obligations or any Expenses relating thereto; or

           (i) any other circumstance other than payment in full which  might
      otherwise constitute a  legal or equitable  discharge or  defense of  a
      guarantor other than fraud by PC DYNAMICS.

      4.   Guarantor   hereby   waives   any   requirement   of    diligence,
 presentment, demand of payment, filing of  claims with a court in the  event
 of receivership or bankruptcy  of BUYER, protest or  notice with respect  to
 all or  any  part  of  the  Obligations, the  benefit  of  any  statutes  of
 limitation, and all demands whatsoever (and Guarantor shall not require that
 the same be made  on BUYER as  a condition precedent  to any of  Guarantor's
 obligations hereunder),  and  covenants  that  this  Guaranty  will  not  be
 discharged, except by complete performance of the Obligations or by  payment
 to PC Dynamics of the entire amount of Guarantor's liability hereunder.

      5.  If demand is  made for payment under  the Notes in accordance  with
 the terms of the Notes, and BUYER fails to immediately pay, PC Dynamics  may
 proceed directly and at  once, without notice,  against Guarantor to  obtain
 performance of and to collect and  recover the full amount, or any  portion,
 of the  Obligations without  first proceeding  against BUYER,  or any  other
 person or entity, or any Collateral for all or any part of the  Obligations.
 Payments and credits, if any, from Guarantor, BUYER, any other guarantor  of
 all or any  portion of  the Obligations  or any  other person  or entity  on
 account of  the Obligations  or  of any  other  liability or  obligation  of
 Guarantor to PC Dynamics, shall be applied to the Obligations in such  order
 as the  PC Dynamics  may  elect, but  neither  Guarantor, BUYER,  any  other
 guarantor of all or any portion of  the Obligations nor any other person  or
 entity shall have any  further liability with respect  to any such  payments
 and credits if such payments and credits have been made as provided  herein;
 provided, however, that if  such payments or credits,  or any part  thereof,
 are subsequently invalidated, declared to be fraudulent or preferential, set
 aside and/or required to be repaid to Guarantor, BUYER, any other  guarantor
 or any  other  person or  entity,  or their  respective  estates,  trustees,
 receivers or any other party under any bankruptcy law, state or federal law,
 common law  or equitable  cause, then,  to  the extent  of such  payment  or
 repayment, the Obligations or other obligations  or liabilities or any  part
 thereof which has been  paid, reduced or satisfied  by such amount shall  be
 reinstated and  shall continue  in full  force  and effect  as of  the  time
 immediately preceding the  time such initial  payment, credit, reduction  or
 satisfaction occurred.

      6.   Guarantor agrees that, notwithstanding anything set forth in  this
 Guaranty to  the contrary,  if, after  demand  is made  under the  Notes  in
 accordance with the terms of the Notes, BUYER fails to immediately pay,  and
 PC Dynamics is prevented by applicable law from exercising any of its rights
 to accelerate the maturity of all or any part of the Obligations, to collect
 all or any part of the Obligations or to enforce or exercise any other right
 or remedy  with  respect to  all  or any  part  of the  Obligations,  or  is
 prevented from  taking any  action to  realize on  all or  any part  of  the
 Collateral, Guarantor shall pay  to PC Dynamics, on  demand therefor and  in
 immediately available funds, the amount that  would otherwise have been  due
 and payable had such rights and  remedies been permitted to be exercised  by
 PC Dynamics.
<PAGE>
      7.   PC Dynamics is  hereby authorized,  without notice  or demand  and
 without affecting the liability  of Guarantor hereunder,  from time to  time
 (a) to renew, extend,  accelerate or otherwise change  the time for  payment
 of, or other terms  relating to, all or  any part of  the Obligations or  to
 otherwise modify, amend or change the terms of the Agreement, the Notes  and
 any of  the  documents  executed in  connection  therewith  (the  "Financing
 Documents"); (b)  to accept  partial payments  on  all or  any part  of  the
 Obligations; (c) to take and hold security or collateral for the payment  of
 all or any part of the  Obligations, this Guaranty, or any other  guaranties
 of all or any part of the Obligations or other liabilities of BUYER; (d)  to
 exchange, enforce, waive and release any such collateral or security; (e) to
 release any other guarantor of the Obligations; and (f) to settle,  release,
 compromise,  collect  or  otherwise  liquidate  all  or  any  part  of   the
 Obligations  and  exchange,  enforce,  release  or  waive  any  security  or
 collateral for all or any part of the Obligations, and any of the  foregoing
 may be done in any manner, without affecting or impairing all or any part of
 the obligations of Guarantor hereunder.

      8.   Subject to the provisions of the Financing Documents, at any  time
 after all or any part of the Obligations have become due and payable,  until
 all of such Obligations have been  paid in full and the Financing  Documents
 have been  terminated, PC  Dynamics may,  in  its sole  discretion,  without
 notice to Guarantor  and regardless  of the  acceptance of  any security  or
 collateral for the payment hereof, appropriate and apply toward the  payment
 of all or any part of such Obligations (a) any indebtedness due or to become
 due from PC  Dynamics to  Guarantor; and (b)  any monies,  credits or  other
 property belonging to  Guarantor, at  any time held  by or  coming into  the
 possession of PC Dynamics.

      9.     Guarantor  hereby  assumes  responsibility  for  keeping  itself
 informed of  the financial  condition of  BUYER and  any and  all  endorsers
 and/or other guarantors of all  or any part of  the Obligations, and of  all
 other circumstances bearing upon the risk of nonpayment of the  Obligations,
 or any part thereof, that diligent inquiry would reveal and Guarantor hereby
 agrees  that  PC  Dynamics  shall  have  no  duty  to  advise  Guarantor  of
 information known to it regarding such condition or any such  circumstances.
 Guarantor hereby acknowledges and agrees that  in the event PC Dynamics,  in
 its sole discretion, undertakes at any time or from tine to time to  provide
 any such information in Guarantor, then the party providing such information
 shall be under no obligation (a)  to undertake any investigation not a  part
 of its  regular business  routine; (b)  to disclose  any information  which,
 pursuant to accepted or reasonable banking or commercial finance  practices,
 such party wishes  to maintain  confidential; or (c)  to make  any other  or
 future  disclosures  of  such  information  or  any  other  information   to
 Guarantor.
<PAGE>
      10.  Guarantor consents and  agrees that PC Dynamics  or any person  or
 entity acting  for or  on behalf  of  PC Dynamics  shall  not be  under  any
 obligation to marshal  any assets  in favor of  Guarantor or  against or  in
 payment of all or any part of the Obligations.

      11.  Until the Obligations shall have been paid in full, Guarantor  (a)
 shall have no right of subrogation  with respect to the Obligations and  (b)
 hereby waives any right to enforce any  remedy which PC Dynamics now has  or
 may hereafter have against BUYER, any endorser or any other guarantor of all
 or any part of the Obligations or any other person or entity, and  Guarantor
 hereby waives any benefit of, and any right to participate in, any  security
 or collateral given to or for the  benefit of PC Dynamics to secure  payment
 or performance of all or any part of the Obligations or any other  liability
 of BUYER to PC Dynamics.  Guarantor  further agrees that any and all  claims
 of Guarantor against BUYER,  any endorser or any  other guarantor of all  or
 any part of the Obligations, or against any of their respective  properties,
 whether arising  by reason  of  any payment  by  Guarantor pursuant  to  the
 provisions hereof, or otherwise, and all indebtedness of BUYER to Guarantor,
 shall be subordinate and subject in  right of payment to the prior  payment,
 in full, of all principal and  interest, all reasonable costs of  collection
 (including, without limitation, attorneys'  and paralegals' fees, costs  and
 expenses) of such  principal and interest  and all Obligations  owing to  PC
 Dynamics by BUYER.  Guarantor also  waive all setoffs and counterclaims  and
 all  presentments,  demands  for  performance,  notices  of  nonperformance,
 protests, notices of protest, notices of dishonor, and notices of acceptance
 of this Guaranty by any person or entity who is at any time an obligee  with
 respect to any of the Obligations.  Guarantor further waives all notices  of
 the existence,  creation or  incurring of  new or  additional  indebtedness,
 arising either from  additional loans extended  to BUYER  or otherwise,  and
 also waives all notices that the  principal amount, or any portion  thereof,
 and/or any interest with respect to any of the Obligations is due, names  of
 any and all proceedings to collect  from the maker, any endorser, any  other
 guarantor, or  any  other  person or  entity  of  all or  any  part  of  the
 Obligations, and, to the extent permitted by law, notices of exchange, sale,
 surrender or  other handling  of  any security  or  collateral given  to  PC
 Dynamics to secure payment of all or any part of the Obligations.

      12.  No delay on the part of PC  Dynamics in the exercise of any  right
 or remedy  arising  under this  Guaranty,  the Note,  or  any of  the  other
 Financing Documents or  otherwise with  respect to all  or any  part of  the
 Obligations, the Collateral or any other guaranty of or security for all  or
 any part of the Obligations shall operate as a waiver thereof, and no single
 or partial exercise by any such person or entity of any such right or remedy
 shall preclude any further exercise thereof.   No modification or waiver  of
 any of the  provisions of this  Guaranty shall be  binding upon PC  Dynamics
 except as expressly set forth in a writing duly executed and delivered by PC
 Dynamics.  Failure by PC Dynamics at any time or times hereafter to  require
 strict performance by BUYER.  Guarantor,  any other guarantor of all or  any
 part of  the  Obligations or  any  other person  or  entity of  any  of  the
 provisions, warranties,  terms and  conditions  contained in  the  Financing
 Documents now or at any time or times hereafter executed by any such persons
 or entities and delivered to PC Dynamics shall not waive, affect or diminish
 any right of PC  Dynamics at any  time or times  hereafter to demand  strict
 performance thereof,  and  such right  shall  not  be deemed  to  have  been
 modified or  waived by  any act  or knowledge  of PC  Dynamics, unless  such
 waiver is contained in an instrument in writing, and directed and  delivered
 to Guarantor or BUYER,  as applicable, specifying such  waiver signed by  PC
 Dynamics.  Any final determination by  a court of competent jurisdiction  of
 the amount of any principal and/or  interest owing by BUYER to PC  Dynamics,
 shall be  conclusive  and  binding  on  Guarantor  irrespective  of  whether
 Guarantor was a party to the suit or action in which such determination  was
 made.
<PAGE>
      13.  This  Guaranty shall  be  binding  upon  Guarantor  and  upon  the
 successors and assigns  of Guarantor and  shall inure to  the benefit of  PC
 Dynamics and its  respective successors and  assigns (which  may include  M-
 Wave, Inc).  All references herein to BUYER and Guarantor shall be deemed to
 include their respective successors and assigns.  The successors and assigns
 of BUYER  and  Guarantor  shall include,  without  limitation,  a  receiver,
 trustee or debtor-in-possession of or for BUYER or Guarantor.

      14.  This Guaranty shall be governed by, and construed and enforced  in
 accordance with, the laws of the  State of Illinois applicable to  contracts
 made and to  be performed within  such State, without  giving effect to  its
 conflicts of laws principles or rules.  Whenever possible, each provision of
 this Guaranty shall  be interpreted in  such manner as  to be effective  and
 valid under applicable law, but if  any provision of this Guaranty shall  be
 held so be prohibited or invalid under applicable law, such provision  shall
 be ineffective only to the extent of such prohibition or invalidity, without
 invalidating the remainder of such provision or the remaining provisions  of
 this Guaranty.

      15.  WITHOUT LIMITING THE RIGHT OF PC  DYNAMICS TO BRING ANY ACTION  OR
 PROCEEDING AGAINST GUARANTOR OR AGAINST PROPERTY OFGUARANTOR ARISING OUT  OF
 OR RELATNG TO  THIS GUARANTY  OR ANY OF  THE OTHER  FINANCING DOCUMENTS  (AN
 "ACTION") IN THE COURTS OF OTHER JURISD1CTIONS, GUARANTOR HEREBY IRREVOCABLY
 SUBMITS TO AND ACCEPTS THE NONEXCLUSIVE  JURISDICTION OF ANY ILLINOIS  STATE
 COURT OR ANY  FEDERAL COURT  SITTING IN  COOK COUNTY,  AND GUARANTOR  HEREBY
 IRREVOCABLY AGREES  THAT ANY  ACTION MAY  BE HEARD  AND DETERMINED  IN  SUCH
 ILLINOIS STATE COURT OR IN SUCH FEDERAL COURT.  GUARANTOR HEREBY IRREVOCABLY
 WAIVES, TO THE FULLEST EXTENT THAT IT MAY EFFECTIVELY DO SO, ANY DEFENSE  OR
 OBJECTION (INCLUDING, WITHOUT LIMITATION, ANY DEFENSE OR OBJECTION TO  VENUE
 BASED ON THE GROUNDS OF FORUM  NONCONVENIENS) WHICH HE MAY NOW OR  HEREAFTER
 HAVE TO THE MAINTENANCE  ANY ACTION IN ANY  JURISDICTION.  GUARANTOR  HEREBY
 IRREVOCABLY AGREES THAT THE  SUMMONS AND COMPLAINT OR  ANY OTHER PROCESS  IN
 ANY ACTION IN ANY JURISDICTION MAY BE SERVED BY MAILING (US1NG CERTIFIED  OR
 REGISTERED MAIL,  POSTAGE PREPA  ID) TO  THE  NOTICE ADDRESS  FOR  GUARANTOR
 SPECIFIED BELOW  OR  BY  HAND DELIVERY  TO  A  PERSON OF  SUITABLE  AGE  AND
 DISCRETION AT SUCH ADDRESS.  SUCH SERVICE WILL BE COMPLETE ON THE DATE  SUCH
 PROCESS IS SO MAILED OR DELIVERED, AND GUARANTOR WILL HAVE THIRTY DAYS  FROM
 SUCH COMPLETION OF  SERVICE IN WHICH  TO RESPOND IN  THE MANNER PROVIDED  BY
 LAW.  GUARANTORMAY ALSO BE SERVED)  IN ANY OTHER MANNER PERMITTED BY LAW, IN
 WHICH EVENT GUARANTOR'S TIME TO RESPOND SHALL BE THE TIME PROVIDED BY LAW.

      16.  TO  TUE  FULLEST  EXTENT  PERMITTED  BY  LAW,  AND  AS  SEPARATELY
 BARGAINED-FOR CONSIDERATION TO PC DYNAMICS,GUARANTOR HEREBY WAIVES ANY RIGHT
 TO TRIAL  BY JURY  (WHICH PC  DYNAMICS  ALSO WAIVES)  IN ANY  ACTION,  SUIT,
 PROCEEDING OR COUNTERCLAIM OF  ANY KIND ARISING OUT  OF OR RELATING TO  THIS
 GUARANTY, ANY OF THE OTHER FINANCING  DOCUMENTS, OR PC DYNAMICS' CONDUCT  IN
 RESPECT OF ANY OF THE FOREGOING.
<PAGE>
      17.  Any notice required or  desired to be  served, given or  delivered
 hereunder shall be  in writing,  and shall be  deemed to  have been  validly
 served, given or delivered  (a) one (1) Business  Day after being  deposited
 with a nationally-recognized overnight courier with all charges prepaid,  or
 (b) when delivered, if band-delivered, by  messenger, in each case  properly
 addressed to the party will  be notified at the  address for such party  set
 forth on the signature page of this Guaranty.

      18. This  Guaranty may  be executed  in separate  counterparts each  of
 which shall be an original and all of which taken together shall  constitute
 one and the same instrument.

      19.  Guarantor hereby  agrees that, regardless  of whether any  amounts
 are hereafter funded under the Note, Guarantor shall not disclose the  terms
 of  any  of  the  Financing  Documents  to  any  party  (including,  without
 limitation, other sources of financing), without PC Dynamics' prior  written
 consent.  The  terms  of  this paragraph  shall  survive  the  expiration or
 termination hereof.

      20.  The remedies herein provided  are cumulative and not exclusive  of
 any remedies  provided  by  law.    The  section  headings  herein  are  for
 convenience of  reference  only,  and  shall  not  affect  in  any  way  the
 interpretation of any of the provisions hereof.  The singular shall  include
 the plural and vice versa and any  gender shall include any other gender  as
 the context way require.

      21.  Wherever  possible,  each provision  of  this  Guaranty  shall  be
 interpreted in such  manner as to  be effective and  valid under  applicable
 law, but if any provision of this Guaranty shall be prohibited by or invalid
 under such law, such  provision shall be ineffective  to the extent of  such
 prohibition  or  invalidity  without  invalidating  the  remainder  of  such
 provision or the remaining provisions of this Guaranty.
<PAGE>
 IN WITNESS WHEREOF, this Guaranty has been  duly executed as of the day  and
 year first set forth above.


                                    /s/
                                ____________________________________________
                                    PERFORMANCE INTERCONNECT CORP.


                                    Notice Address:
                                    [TO FOLLOW]
                                    Telephone: _______________________
                                    Telecopy: ________________________


 Agreed and Accepted

 PC DYNAMICS CORPORATION

      /s/
 By: ________________________________
 Name: ______________________________
 Its: _________________________________



 Notice Address:

 216 Evergreen Street
 Bensenville, Illinois  60106