[1000mp] Slow release of fast AGC
Anders Granstrom
[email protected]
Fri, 10 Oct 2003 16:49:11 +0200
Since there seems to be some intrest for the mod I shall give a brief description of it here.
I only have a very poor fax where to put the extra components on the solder side of the IF board. I discoverd some printing errors in the mod (but they are corrected here).
The mod is called "Modification to improve AGC action in data mode FT-1000MP".
On IF unit:
3. on solder side of IF unit remove R2140 (corrected! original R1240) 15k and R2142 (corrected ! original R2142) 56k.
4. Add 56k between the junction C2105 and R2124 to R2076.
5. Add a 100K from the same junction to R2003.
Not in the mod but, (got that info from somewhere else (don't remember just now) C2235 3.3uF shall also be removed (on solder side) if it exists.
SM0IHR /Anders
! IF-PCB !
------------------------------------
! ! !
!---- 100K---!---56k ------!
>From: "Barry N1EU"
>Reply-To: [email protected]
>To: [email protected]
>Subject: [1000mp] Slow release of fast AGC
>Date: Thu, 09 Oct 2003 21:20:09 -0400
>
>I am in touch with Chip Margelli at Yaesu USA who is looking into
>the service bulletin that SM0IHR mentioned (thanks Anders) and will
>report back to the reflector any info he can provide. If there's a
>service bulletin document, I will post it on my Web site and provide
>the URL.
>
>Wanted to add that the problem is particularly bad in my MP when the
>radio is cold, and is still intermittent when the radio is warm.
>I've observed this (slow release/unmuting of fast AGC) in both MP's
>I've owned, of '98-'99 vintage.
>
>73,
>
>Barry N1EU
>www.n1eu.com
>
>_________________________________________________________________
>Instant message during games with MSN Messenger 6.0. Download it now
>FREE! http://msnmessenger-download.com
>
>_______________________________________________
>List Moderator: Richard Lubash N1VXW
>1000mp mailing list
>[email protected]
>To Change Options or Unsubscribe:
>http://mailman.qth.net/mailman/listinfo/1000mp
------------------------------------------
Tired of spam? Get
------------------------------------------
advanced junk mail protection
------------------------------------------
with MSN 8.
------------------------------------------
--- StripMime Report -- processed MIME parts ---
text/html (html body -- converted)
The reason this message is shown is because the post was in HTML
or had an attachment. Attachments are not allowed. To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html ---