{Collins} Re: 75S-3B VFO Repair




Hi Olaf,
    Go to the following URL and I think you will find the information that you are looking for regarding the PTO.

                    http://www.collinsra.com/cra_album/0002/cra_0002.html

    I came across this a sometime back, printed it out, and filed it away in my S-Line notes.  Hope it helps.

        73
Tony - W9JXN


Olaf Madsen wrote:

> Hello All,
> I am trying to get into shape a very neglected 75S-3B and have to get into the little VFO box.----The NPO 5-25 pF trimmer ( C-308 ) has been replaced by another,poorly fitting type, and the USB/LSB shift can no longer be properly adjusted.
>
> I have taken loose the back support plate and peeked into the little box,but it looks like I have to take it all the way out of the rig and see from there,what can be done.
> ..
> Can anyone give me some advice or lead me thru the procedure,how to get the VFO out of the radio..Looks pretty tricky and I would benefit from someones experience on this problem..
>
> Also,where can I get replacement for the C-308 trimmer capacitor.At present, I intend to swap one out of the 28 mHz RF or mixer circuit,using there,whatevewr comes close.
>
> Thank you for any advice on the subject.
>
> 73's de Olaf,KF4TP.
>
> Sponsored by the Collins Collectors Association http://www.collinsradio.org
> Nets: Tues: 3.805 Mc-2000 Central / Thur: 3.875 Mc-2000 Central
> Fri: 3.895 Mc-2000 Pacific / Sun: 14.263 Mc-2000 UTC
> 1st Wed (of the month) AM Net 3.880 Mc-2000 local (ET, CT, MT, PT)
> Sun AM Net: 29.050 Mc-1200 Central

Sponsored by the Collins Collectors Association http://www.collinsradio.org
Nets: Tues: 3.805 Mc-2000 Central / Thur: 3.875 Mc-2000 Central
Fri: 3.895 Mc-2000 Pacific / Sun: 14.263 Mc-2000 UTC
1st Wed (of the month) AM Net 3.880 Mc-2000 local (ET, CT, MT, PT)
Sun AM Net: 29.050 Mc-1200 Central





This archive was generated by a fusion of Pipermail (Mailman edition) and MHonArc.