On Mar 8, 2020, at 11:58, Dick <w1ksz@...> wrote:

?

This has been a great learning process and a lot of fun.

What I now believe the issue of crazy S-Meter readings is due to the

frequency of the Second LO Crystal (5,595 KHz) being off frequency.

In the Alignment Procedure (para. 6.4.5) it calls for zero beating with

C61. In my case, C61 (1-8 pf) had little or no effect. I added 24 pf cap

across C61 and saw a dramatic decrease in tone frequency. I changed

out the 24 pf for a 50 pf and saw the tone frequency drop further.

I also saw a corresponding increase in S-Meter reading. So my guess is,

the Crystal being off-frequency shifts the resultant signal in the passband

enough to cause the S-Meter to read wrong.

However, there's just so much C you can add before the Oscillator stops.

So, what I need to find is an organ donor R-4 and either just get the

Crystal, or get the whole board.

Any donors out there ??

73, Dick, W1KSZ

This has been a great learning process and a lot of fun.
What I now believe the issue of crazy S-Meter readings is due to the
frequency of the Second LO Crystal (5,595 KHz) being off frequency.
In the Alignment Procedure (para. 6.4.5) it calls for zero beating with
C61. In my case, C61 (1-8 pf) had little or no effect. I added 24 pf cap
across C61 and saw a dramatic decrease in tone frequency. I changed
out the 24 pf for a 50 pf and saw the tone frequency drop further.
I also saw a corresponding increase in S-Meter reading. So my guess is,
the Crystal being off-frequency shifts the resultant signal in the passband
enough to cause the S-Meter to read wrong.
However, there's just so much C you can add before the Oscillator stops.
So, what I need to find is an organ donor R-4 and either just get the
Crystal, or get the whole board.
Any donors out there ??
73, Dick, W1KSZ

Have you tried to see if Quartslab or AF4K have any available?

Steve Wedge, W1ES/4

- the typos have been generated by highly sophisticated software.

On Mar 8, 2020, at 11:58, Dick <w1ksz@...> wrote:

?
This has been a great learning process and a lot of fun.

What I now believe the issue of crazy S-Meter readings is due to the
frequency of the Second LO Crystal (5,595 KHz) being off frequency.

In the Alignment Procedure (para. 6.4.5) it calls for zero beating with
C61. In my case, C61 (1-8 pf) had little or no effect. I added 24 pf cap
across C61 and saw a dramatic decrease in tone frequency. I changed
out the 24 pf for a 50 pf and saw the tone frequency drop further.

I also saw a corresponding increase in S-Meter reading. So my guess is,
the Crystal being off-frequency shifts the resultant signal in the
passband
enough to cause the S-Meter to read wrong.

However, there's just so much C you can add before the Oscillator stops.

So, what I need to find is an organ donor R-4 and either just get the
Crystal, or get the whole board.

Any donors out there ??

73, Dick, W1KSZ

On Mar 8, 2020, at 9:10 PM, Vince Vielhaber <vev@...> wrote:

?Quartslab quoted me around $45-$50 shipped for it (exchange rate fluctuations move it around). ?Bomar was even worse, $50 plus shipping and a $100 minimum order (before shipping).

Another member of this list told me to try changing C62 to a 5.6pf, it's currently 12pf. ?It's a disc cap but all I had handy was a 4pf SM so I used that. ?Brought it real close and C61 was able to finish the job.

C62 is on that little board, easy to get to. ?It's connected between pins 1 and 2 on V3.

Vince - K8ZW.



On 03/08/2020 01:50 PM, Steve Wedge wrote:

Have you tried to see if Quartslab or AF4K have any available?

Steve Wedge, W1ES/4

- the typos have been generated by highly sophisticated software.

On Mar 8, 2020, at 11:58, Dick <w1ksz@...> wrote:

?

This has been a great learning process and a lot of fun.

What I now believe the issue of crazy S-Meter readings is due to the

frequency of the Second LO Crystal (5,595 KHz) being off frequency.

In the Alignment Procedure (para. 6.4.5) it calls for zero beating with

C61. In my case, C61 (1-8 pf) had little or no effect. I added 24 pf cap

across C61 and saw a dramatic decrease in tone frequency. I changed

out the 24 pf for a 50 pf and saw the tone frequency drop further.

I also saw a corresponding increase in S-Meter reading. So my guess is,

the Crystal being off-frequency shifts the resultant signal in the

passband

enough to cause the S-Meter to read wrong.

However, there's just so much C you can add before the Oscillator stops.

So, what I need to find is an organ donor R-4 and either just get the

Crystal, or get the whole board.

Any donors out there ??

73, Dick, W1KSZ

--
?K8ZW ?http://www.metalworkingfun.com ??http://www.hamradio.fun

Hello there Vince!

This is AF4K in Florida. We supply crystals to military and amateur
users around the globe. How can we help you today?

Best regards - Bry Carling, AF4K

On Mar 8, 2020, at 9:10 PM, Vince Vielhaber <vev@...> wrote:

?Quartslab quoted me around $45-$50 shipped for it (exchange rate
fluctuations move it around). Bomar was even worse, $50 plus shipping
and a $100 minimum order (before shipping).

Another member of this list told me to try changing C62 to a 5.6pf,
it's currently 12pf. It's a disc cap but all I had handy was a 4pf SM
so I used that. Brought it real close and C61 was able to finish the job.

C62 is on that little board, easy to get to. It's connected between
pins 1 and 2 on V3.

Vince - K8ZW.



On 03/08/2020 01:50 PM, Steve Wedge wrote:

Have you tried to see if Quartslab or AF4K have any available?

Steve Wedge, W1ES/4

- the typos have been generated by highly sophisticated software.

On Mar 8, 2020, at 11:58, Dick <w1ksz@...> wrote:

?
This has been a great learning process and a lot of fun.

What I now believe the issue of crazy S-Meter readings is due to the
frequency of the Second LO Crystal (5,595 KHz) being off frequency.

In the Alignment Procedure (para. 6.4.5) it calls for zero beating with
C61. In my case, C61 (1-8 pf) had little or no effect. I added 24 pf cap
across C61 and saw a dramatic decrease in tone frequency. I changed
out the 24 pf for a 50 pf and saw the tone frequency drop further.

I also saw a corresponding increase in S-Meter reading. So my guess is,
the Crystal being off-frequency shifts the resultant signal in the
passband
enough to cause the S-Meter to read wrong.

However, there's just so much C you can add before the Oscillator stops.

So, what I need to find is an organ donor R-4 and either just get the
Crystal, or get the whole board.

Any donors out there ??

73, Dick, W1KSZ

--
K8ZW