[Boatanchors] Where is C32 in the 75A-3?

[David Harmon]

Rob....
My book is completely different.
I have the June 1 53' edition. There is an addenda sheet stating that C32 is
a trimmer but I have never adjusted it....
Your book is probably later than mine.
The s/n of my unit is 65....rather low.
My schematic shows C32 as a fixed mica in the position that you stated.
But.....now I DO remember reading somewhere that there is a trimmer inside
that filter box.
Perhaps someone else would know about it and how it can be adjusted.
I suggest a shout out on the CCA list....


73

David Harmon
K6XYZ
Sperry, OK

-----Original Message-----
From: Rob Atkinson [mailto:ranchorobbo at gmail.com] 
Sent: Tuesday, October 28, 2014 8:25 PM
To: David Harmon
Cc: Boat Anchors List
Subject: Re: [Boatanchors] Where is C32 in the 75A-3?

Hi David thanks,

I'm on page 5-0 of the 75A-3 Instruction Book.  Section V.
Maintenance.  Part 4. 455-KC IF Alignment.  Step 11:  "Tune C-32 for maximum
VTVM reading."

On my schematic C32 is next to L30.  Both come off the plate of V18.

Rob
K5UJ

On Tue, Oct 28, 2014 at 8:01 PM, David Harmon <k6xyz at sbcglobal.net> wrote:
> Hi Rob.....
>
> C32 is a fixed mica located in the filter box.
> Could you have transposed C23 with it?
> C23 is a 20mtr trimmer located under the RF cover.
>
>
> 73
>
> David Harmon
> K6XYZ
> Sperry, OK
>
> -----Original Message-----
> From: Boatanchors [mailto:boatanchors-bounces at mailman.qth.net] On 
> Behalf Of Rob Atkinson
> Sent: Tuesday, October 28, 2014 7:01 PM
> To: Boat Anchors List
> Subject: [Boatanchors] Where is C32 in the 75A-3?
>
> I'm studying the alignment procedure for the 75A-3, looking at the 
> schematic and the chassis photos in the manual.  The instructions for 
> the 455 kc alignment say to peak C32, a trimmer cap that I finally 
> located in a seemingly out of place part of the set in the mechanical
> filter assembly box.   At least that's where it seems to be judging by
> the schematic, the only thing I can find it on.   I'd like to know the
> physical location of C32--for example, do I need to remove the 
> mechanical filter box (the thing the two filters seat on to) in order to
get to it?
> Jeepers.
>
> tnx 73
>
> Rob
> K5UJ
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