[ARC5] B&W 350 Phase Shift Network for W2EWL SSB rig

[Frank Barnes]

Thanks to everyone for the comments.  Hue, I guess I'll find out about the
resistors if and when I ever get around to building the xmtr!  I'm thinking
old technology, old tubes and old designs should work for old me (I'm 84
next month).  Am thinking about using my BC-221 as the VFO (amplified a
bit) and feeding that into a 6AG7 buffer and an 807 final amp.  Nice little
40 watt  xmtr.  Maybe two 807's...who knows; I have a half dozen of them.
Or 6146B's. But I have too many other projects to finish first.  First step
is to fix the BC-221 which suddenly stopped working; I think it's just a
failure of the spring-loaded output wiper that feeds the the antenna
connection.
73,
Frank
www.w4npn.org


On Sun, Apr 20, 2025 at 11:16 PM millerke6f--- via ARC5 <
arc5 at mailman.qth.net> wrote:

> Here is the one used in the HEATHKIT  SB-10 SSB adaptor for what it's
> worth.   I've duplicated this
> guy more than once over the years and stuff them in old metal can octal
> tube cases.  Work like champs
> and modern .1 percent resistors at pennies each and NPO smt caps work well
> also.
>
> Fud fer thoat
>
> Bob KE6F
>
>
> [image: Inline image]
>
>
> On Sunday, April 20, 2025 at 07:29:50 PM PDT, Hubert Miller <
> kargo_cult at msn.com> wrote:
>
>
> I have a Lakeshore Bandmaster II-B, the one with the VFO. I don't know
> whether its size + weight and the not sane number of my other projects will
> dictate i sell it. I also have an audio phase shift network in a little
> package like a metal tube. I don't remember the maker right now - this is
> what happens apparently when the % of memory space used approaches the
> capacity - but you will know it anyway. I was wondering about the longterm
> stsbility of the 1% resistors in the audio phase shift networks. Knowing
> about old - style carbon resistors, i am not optimistic.
> -Hue Miller
>
>
>
> Sent from my Galaxy
>
>
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-- 
Frank Barnes
www.W4NPN.net
Chapel Hill, NC
Grid Square FM05
Cell 919.260.7955
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