Ian King wrote:


The sensitivity is terrible, so I'm trying to align the radio and see if it
becomes acceptable. Problem is this: I'm injecting a signal as instructed
in the alignment instructions and attempting to peak T7 and T10 - with no
results. I'm hearing a signal, but from lock to lock on the transformers,
there's no peak (or dip). I have the AVC set to 'fast' (per the manual).
Any suggestions, anyone? TIA -- Ian

Hmmm, in the manual they say it will be broad...
Here's a thought. Since both coils exhibit this symptom and the set
still works to some degree, my thought is that you're not hitting on
50kc. To align the these 50kc coils they are having you inject a 5645
kc signal further upstream. The 50kc product is reliant on the 5595
xtal oscillator plus the 5645 signal from the generator.
If your generator was in fact putting out at say 5640 it would fall out
of the design range of these adjustments but you would still hear it and
probably get a meter deflection.
I'd suggest verifying that these two freqs are correct. This is why
they are insisting in the instructions that you listen for zero beat
which again requires that the calibrator and 50kc osc be properly
aligned first if I follow their logic correctly.
They wrote the alignment instructions with the assumption that a guy
would not have a sig gen that goes as low as 50kc. Do you have access
to one? That would take some of the variables out of the process.
Also make sure the notch filter is sufficiently detuned so as not to be
a player in the process.

GL,
Bill

- - Bill - - wrote:
Ian King wrote:


The sensitivity is terrible, so I'm trying to align the radio and see
if it
becomes acceptable. Problem is this: I'm injecting a signal as
instructed
in the alignment instructions and attempting to peak T7 and T10 - with no
results. I'm hearing a signal, but from lock to lock on the
transformers,
there's no peak (or dip). I have the AVC set to 'fast' (per the manual).
Any suggestions, anyone? TIA -- Ian


Hmmm, in the manual they say it will be broad...\

One additional comment. Its been a while since I did one of these but I
don't recall that you will 'hear' any real difference while finding the
peak but you will see a slow rise/fall on the s-meter.

-Bill

On Sun, 22 Nov 3903 07:12:43, "Ian King"
wrote:

looks like it sat in someone's carport for several years. Nonetheless,
...
The sensitivity is terrible,

...attempting to peak T7 and T10 - with no
results. I'm hearing a signal, but from lock to lock on the transformers,
there's no peak (or dip).
...

Have you cleaned it? Maybe there's enough dirt and grime to short
out the signal or reduce the Q of T7 and T10 so you can't peak it.

de ah6gi/4