[Collins] Re: Need help on a 32S-1 transmitter

[David Murman]

I forgot to mention that a couple of the trimmer caps are bad. Does anyone
know where I can get the 5 to 37.5 uuf (917-1073-00) and the 8 to 50 uuf
(917-1075-00) trimmers?

I have some from Collins with a part number of 917-1074-00. Can anyone tell
me if these trimmers would work in place of the 917-1073-00? The trimmers
show a value of 5-30 uuf on them and the schematic shows the trimmers as
5-25 uuf but the parts description show a value of 5-37.5 uuf.

I also have some that are 1.5 to 7 uuf if anyone needs this value.


Again thanks;
David

----- Original Message ----- 
From: "David Murman" <dmurman at verizon.net>
To: <collins at mailman.qth.net>
Sent: Saturday, November 05, 2005 7:33 AM
Subject: Need help on a 32S-1 transmitter


> I am in need of some technical help with a Collins 32S-1 transmitter that
I
> purchased. The previous owner said he got excellent reports with it before
> he put it on the shelf. When I got the transmitter it was not working at
> all, had one tube that the filaments did not light and I had to replace a
> number of the tubes. After replacing the defective tubes I still got no
> power out.
>
> Well I tuned up the transmitter on 3.6 mhz with my scope as per the manual
> and up to the final gird I have power but I see no grid current on the
meter
> nor much power out ( about 1-2 watts). I noticed that I can peak the
exciter
> tuning but when I dipthe pa tuning the power to the input to the finals
goes
> down. I do get a good dip but then again I only see about a 1 or 2 watts
out
> and NO grid current. Rocking the pa tuning I see the power increase to the
> grid of the final.
>
> Looking at the coil in the final area it looks like it was re-soldered. I
> don't have any idea if the taps are in the right area. I have attached a
pic
> of the coil.
>
> Also the manual I downloaded from the Collins page is missing page 11 and
12
> and there is no good parts layout that I can find on the web.
>
> Anyone have any ideas as to the issue with the grid curent and PA loading
> not giving increases power when dipped? Also anyone have page 11 and 12
and
> any parts layout of this transmitter that they can send me?
>
> Would really like to get this transmitter working with my 75S-3.
>
>
>
> Thanks;
> David
> WA4ECM
>