[ARC5] [MMRCG] Hello R1155 Fans

[Al Klase]

Hi Dave,

Thanks for the video.  I don't know much about the LO pulling except 
from, just now, looking at the schematic.  The cathode and grid-return 
of the triode section of V4 go directly to ground.  So it's hard to see 
when the interaction comes in.

The first thing I'd do is swap out V4, a 6K8, in case there is some 
internal leakage from the AVC'ed signal grid..

A stitched together copy of the N-schematic is attached.

This was another case of the original .pdf's I was working with being 
locked up so I couldn't extract the images.  However, today there is an 
easy fix for that:  Printing the file using Microsoft "Print to PDF" 
gets you an unlocked copy.  Extract the schematic images a .png's and 
stitch them together using "Image Composite Editor" another free marvel 
from Microsoft .

Merry Christmas,
Al

ARK Sig Block Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
On 12/18/2022 12:59 PM, David Stinson wrote:
> Been working on a "Christmas Present" U.K. R1155
> receiver.  Playing nicely now, but still have
> some issues:
> https://photos.app.goo.gl/WiPupJQ7bf6hwCNC7
>
> It's running on well-regulated 135VDC B+.
> When I'm not using AVC, turning the gain control
> pulls the local oscillator.  When using AVC,
> it doesn't.  Before I start digging-in, is
> this something you've seen before?
>
> Also- I need to remove the front bezel in
> order to change the discoloured Perspex window.
> On the "old" tuning knob, one removed the logging
> ring around the tuning knob and the assembly came
> off without disassembling the tuning knob/drive.
>
> This N-model has the "new" tuning drive:
> https://photos.app.goo.gl/EJQymom4vM9PSDGc8
> Does someone know the proper procedure for
> pulling this bezel?  I don't want to assume
> or "by guess and by golly" if I can prevent it.
> There appear to be screws to secure the drive which
> come from the inside of the bezel.
>
> Thanks, everyone.
> 73 Dave AB5S
>
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