[Hallicrafters] SR-400A S-Meter Zero

[James Liles]

Hi again Alexander:
Forgot to include the rest of the note.  The 82K 1W resistor should be 82K 
+0-10% and the 36K and 27K +-5%.  Use metal film or metal oxide, not carbon 
resistors.  If this doesn't help, replace V8 or V6 or V1, they can influence 
the AGC line.  BTW, many of us get but 5 miles per gallon.  Great 
calculation Alex.   Kindest regards Jim K9AXN

ORIGINAL MESSAGE:

> Message: 2
> Date: Mon, 1 Nov 2010 09:01:20 -0400
> From: "Alexander N. Gerli Sr." <ac1y at nc.rr.com>
> Subject: [Hallicrafters] SR-400A S-Meter Zero
> To: <hallicrafters at mailman.qth.net>
> Message-ID: <EB.FD.19545.F1ABECC4 at cdptpa-omtalb.mail.rr.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi, gang!
>
> Somewhere, there was a post (by Jim K9AXN, I think...) that dealt with
> unstable S-Meter zeroing. I had a HD crash and lost lots of my ham radio
> e-mail files.
>
> Does anyone recall this post/thread? I have the SR-400A on the bench, and
> that's one thing I want to take care of. There is a 1/2W resistor off the
> S-Meter Zero pot that I'm going to change to a 1% 1W modern resistor just 
> to
> be on the safe side anyway.
>
> 73,
>
> Sandy AC1Y
>
> Alexander N. (Sandy) Gerli, Sr.
> 5805 Newhall Road
> Durham, NC  27713-2615
> 919-489-9638
>
> CCA # AC9800001
>
> A Scotsman drinks 40 gallons of alcohol each year.
> A Scotsman walks 900 miles each year.
> Scotsmen get about 25 Miles Per Gallon.
>
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 1 Nov 2010 15:39:25 -0000
> From: "george" <kf9wv at att.net>
> Subject: [Hallicrafters] knob
> To: <hallicrafters at mailman.qth.net>
> Message-ID: <D482CF738A6F4E57AD46DE9202F92432 at george07h5npj6>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Need the BFO knob for a s-38 radio,anyone?KF9WV
>
> ------------------------------
>
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> End of Hallicrafters Digest, Vol 82, Issue 1
> ********************************************