From: oppedahl@panix.com (Carl Oppedahl)
Subject: Re: Extended recieve for IC-W2A
Date: Sat, 19 Dec 1992 16:03:59 GMT
Organization: PANIX Public Access Unix, NYC

In <1992Dec18.182729.45767@kuhub.cc.ukans.edu> baxter@kuhub.cc.ukans.edu writes:

>In article <QB307B0A@hxk357>, hkagan@sentry.foxboro.COM (Hesh Kagan) writes:
>> Hi There....
>> Does anyone know the coverage for the IC-W2A with the 'extended' recieve
>> mods? I can't seem to get a clear answer or reception.
>> 
>> Thanks,
>> 
>> N1MDX

>Well, my W2A covers 118-173 on high band, 430-465 on UHF and it hears fairly
>well from 850-880.  While once can program just about any frequency into
>the unit, and the display will show the frequency, the radio will be dead
>unless it has some sensitivity for that frequency in the front end.

>Someone on the net posted a breakdown of the sensitivity for the W2A across
>most of the VHF and UHF ranges, and maybe they'll post it again.

>For the UHF side of things, the radio switches in a different front end
>once you tune above 450 mhz.  This has the adverse effect of killing
>the selectivity of the receiver, and if you're in a high RF environment
>you may get overloaded with intermod.  

>There is a fix for this.  Request Icom to send you the mod sheet (they'll
>FAX it to you).  The mod basically locks the 440 front in ON, even when
>the radio is tuned above 450 -- this cuts out the garbage from other
>services, but it does tend to limit the range of the UHF section to 
>an upper limit of about 465.  The wider front end may hear further up
>the band, but in my area, it was unacceptable.

>Kirk
>N0FPZ

Well, I don't know if this is what N0FPZ was thinking of, but maybe it
will help ...  DE Carl Oppedahl AA2KW.  Quoted previous post follows:


Return-Path: <tcs@ll.mit.edu>
Date: Tue,  1 Dec 92 10:15:57 -0500
From: cmcl2!ll.mit.edu!tcs (Tom Sefranek)
Message-Id: <9212011015.AA03309@LL.MIT.EDU>
To: oppedahl@panix.com (Carl Oppedahl)
Reply-To: cmcl2!ll.mit.edu!tcs
Subject: Re: IC-W2A Rcv Freqs??

ICOM IC-W2A Handi-Talkie Evaluation after modifiactions.

Low Band Receiver Tests		High Band Receiver Tests
Using:				Using:
	HP 8654B		 HP 8654B
	Signal Gen.		 Signal Gen.
	Minimum			 Minimum
	Decernable		 Decernable
	Modulation		 Modulation
	(My Ears)		 (My Ears)

Mhz.	dbm	Modulation	Mhz.	dbm	Modulation
---------------------------	---------------------------
100	-62	A.M.		335	-130	F.M.
105	-67	A.M.		340	-127	F.M.
110	-87	A.M.		345	-123	F.M.
115	-93	A.M.		350	-123	F.M.
120	-102	A.M.		355	-120	F.M.
125	-107	A.M.		360	-120	F.M.
130	-105	A.M.		365	-114	F.M.
135	-105	F.M.		370	-114	F.M.
140	-112	F.M.		375	-115	F.M.
145	-117	F.M.		380	-116	F.M.
150	-115	F.M.		385	-117	F.M.
155	-107	F.M.		390	-120	F.M.
160	-107	F.M.		395	-130	F.M.
165	-103	F.M.		400	-130	F.M.
170	-102	F.M.		405	-130	F.M.
175	-73	F.M.		410	-130	F.M.
180	-73	F.M.		415	-130	F.M.
185	-74	F.M.		420	-130	F.M.
190	-75	F.M.		425	-130	F.M.
195	-77	F.M.		430	-130	F.M.
200	-67	F.M.		435	-130	F.M.
205	-70	F.M.		440	-130	F.M.
210	-71	F.M.		445	-130	F.M.
215	-63	F.M.		450	-130	F.M.
220	-63	F.M.		455	-130	F.M.
225	-67	F.M.		460	-130	F.M.
230	-67	F.M.		465	-130	F.M.
235	-67	F.M.		470	-130	F.M.
240	-66	F.M.		475	-130	F.M.
245	-63	F.M.		480	-130	F.M.
250	-57	F.M.		485	-130	F.M.
255	-70	F.M.		490	-130	F.M.
260	-83	F.M.		495	-130	F.M.
265	-87	F.M.		500	-130	F.M.
270	-93	F.M.		505	-130	F.M.
275	-93	F.M.		510	-130	F.M.
280	-93	F.M.		515	-113	F.M.
285	-93	F.M.		520	-112	F.M.
290	-97	F.M.		525	-110	F.M.
295	-100	F.M.
300	-100	F.M.
305	-97	F.M.
310	-95	F.M.
315	-90	F.M.
320	-93	F.M.
325	-90	F.M.
330	-80	F.M.


Low Band Transmitter Tests	High Band Transmitter Tests
Using:				 Using:
	HP 436A				HP 436A
	Power Meter			Power Meter
	with a				with a
	HP 8482H			HP 8482H
	Power Sensor			Power Sensor
	(Pure Spectrum			(Pure Spectrum
	 NOT Assured!)			 NOT Assured!)

Mhz.	Watts			Mhz.	Watts
-------------			-------------
124	1.6			410	1.75
125	1.68			415	1.75
130	1.92			420	1.75
135	2.03			425	1.7
140	2.15			430	1.7
145	2.24			435	1.65
150	2.07			440	1.65
155	1.7			445	1.6
160	1.5			450	1.6
165	1.19			455	1.5
170	1.07			460	1.4
175	 .84			465	1.3
180	 .16			470	1.15
185	 .025			475	1
				480	 .85
				485	 .665
				490	 .445

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