[R-1051] 100CPS Synth Schematic

[John Schmitz]

John,
Sure will. I think I have the conversion all mapped out. Basically it looks
like all I have to do is supply the following to the translator to make it
work

For 500:
Freq Control Line (J12/P1 Pin 14) = Ground
Z1 Code Line (J12/P1 Pin 11) = No Connection just hangs open
Z2 Code Line (J12/P1 Pin 17) = +4v
Z4 Code Line (J12/P1 Pin 13) = +4v
Loop Control Line (J12/P1 Pin 19) = +4v

For 000:
Freq Control Line (J12/P1 Pin 14) = No Connection just hangs open
Z1 Code Line (J12/P1 Pin 11) = +4v
Z2 Code Line (J12/P1 Pin 17) = No Connection just hangs open
Z4 Code Line (J12/P1 Pin 13) = No Connection just hangs open
Loop Control Line (J12/P1 Pin 19) = No Connection just hangs open

For Vernier:
Freq Control Line (J12/P1 Pin 14) = Variable Voltage from Vernier
Z1 Code Line (J12/P1 Pin 11) = +4v
Z2 Code Line (J12/P1 Pin 17) = No Connection just hangs open
Z4 Code Line (J12/P1 Pin 13) = No Connection just hangs open
Loop Control Line (J12/P1 Pin 19) = Ground

The above is my interpretation from reading the schematic. I will test it
before I commit to actually making the changes, if it works I will let the
group know. The change will require some rewiring around the CPS switch and
etching a replacement board for the A11 500 cps control board. My intent is
to keep everything so that I can reverse it as well in case the correct
6-pack happens along my path. So I plan to document the change well and will
put it up on the web. That is if it all works, fingers crossed.

Thanks all

John



-----Original Message-----
From: r-1051-bounces at mailman.qth.net
[mailto:r-1051-bounces at mailman.qth.net]On Behalf Of jwatkins
Sent: Saturday, March 03, 2007 7:57 PM
To: 'R-1051 Discussion Group'
Subject: RE: [R-1051] 100CPS Synth Schematic

Hi John,

If you get it to work, please post it.  I would bet that those of us that
have the plain Jane R-1051 would be interested.

By the way, as most will have noticed, there is a T-827B (2-30Mhz 100Mw
exciter) on the place.

Cheers,

John  WD5ENU/A45XV

-----Original Message-----
From: r-1051-bounces at mailman.qth.net [mailto:r-1051-bounces at mailman.qth.net]
On Behalf Of Al Parker
Sent: Saturday, March 03, 2007 2:40 PM
To: R-1051 Discussion Group
Cc: cjs004 at comcast.net
Subject: Re: [R-1051] 100CPS Synth Schematic

Hi John,
    Did you get any replies?  If not, I think I have it in a manual, will
get a look & scan it for you after supper.
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.boatanchors.org
http://www.hammarlund.info

----- Original Message -----
From: "John Schmitz" <cjs004 at comcast.net>
To: <r-1051 at mailman.qth.net>
Sent: Saturday, March 03, 2007 11:30 AM
Subject: [R-1051] 100CPS Synth Schematic


> Anybody got a scan of the 100CPS Synthesizer schematic in the six pack?
>
> I have a straight 1051 (no suffix) and it needs a six pack with a 500
CPS
> synth but it came with a six pack for a B model with a 100 CPS synth. I
just
> learned the long way they are not compatible. To make a long story short
I
> was getting an incredible amount of noise from the receiver that would
not
> quite with a signal applied. I started tracing and discovered the 100KHz
> injection was where the noise was coming from. Further tracing revealed
that
> one of the inputs to the 100KHZ Synth is from the 500 CPS synth, which
was
> not present. Further investigation revealed that the non B 500 CPS
Vernier
> circuit is not compatible with the B and beyond 100 HZ steps Vernier
> circuit. I am now going to attempt to try and make the 100CPS synth work
in
> the non B 1051 by supplying what the 100 CPS synth needs just to produce
> 000, 500, and Vernier outputs. I am attempting this because I don't know
of
> any sources of non B six packs or 500cps synthesizer so if I want an
> operational R-1051 I'm gona have to make this one work.
>
> However, I do not have a B techmanual, I can only find the non B tech
manual
> on the internet. So if someone could be so kind as to send me a scan of
just
> the 100cps synth I think I can get this thing to work with a B and
beyond
> six pack. Of course if someone has a spare 500cps synth or a non B six
pack
> that could work to. I could even trade my B model six pack or 100 cps
synth
> for your non B six pack or 500cps synth. You send me yours and I'll send
you
> mine.
>
> Thanks in advanced for any help.
>
>
> _______________________________________________
> R-1051 mailing list
> R-1051 at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/r-1051
>


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