Gregb
10-03-2015, 09:33 AM
Hi Guys:
I am working on my TV-37 and have finished recapping and re-resistoring, I have never had any set with so many out of tolerance resistors. I ended up replacing all of them!
Anyway, I am to the point of doing the alignment and am peaking the IF coils and all of them are backed all the way out to the top and I have not reached the peak. The reception is pretty good and I can live with it the way it is but I think it can be better. I would think if things were correct the adjustments should be about midway in the coil. Anyone have a thought on this?
Thanks
Gregb
old_coot88
10-03-2015, 12:09 PM
Peaking the IF coils?? Do you mean as if peaking the IFs in an AM radio?
The IF strip in a TV is not 'peaked' but stagger-tuned to accommodate the wideband video signal. To do it right requires a sweep generator and oscilloscope.
Gregb
10-03-2015, 12:54 PM
Sorry, I don't have all of the terminology down just yet but yes I understand it is stager tuned to a few different frequencies. I did not have to adjust hardly at all from as found but all of them are right at the end of adjustment. The picture and sound are very good so I am happy with it as is but was just wondering why they ended up where they did.
Gregb
old_coot88
10-03-2015, 01:51 PM
As long as the pic is good with no ringing or smearing of fine detail (symptoms of IF misalignment), you're good irrespective of where the slugs end up.
Gregb
10-03-2015, 01:56 PM
It looks pretty good on that little tiny screen and to my bad eyes. I just followed the alignment that the Sams shows using my signal generator and VTVM. I have picked up a WaveTek 1080 sweep generator that I am just in the process of checking out and will give it a sweep check shortly I hope.
Gregb
tvdude1
10-03-2015, 04:06 PM
Glad you like the set . Sorry for all that bubble wrap but it did make it without a scratch. Send pictures please.
Gregb
10-03-2015, 04:18 PM
Thanks for the great packing job! I will post some pics in the next couple days.
Gregb
Sandy G
10-03-2015, 05:51 PM
TV-37s are CUTE, & still reasonably plentiful, altho GOOD examples are harder to find nowadays. I think mine was the 1st "Vintage" TV I ever got on Evilbay, 15-20 yrs ago.
Gregb
10-06-2015, 06:35 PM
Some pictures of my TV37, top, bottom and a couple CRT shots. I will post another once assembled.
Gregb
tvdude1
10-06-2015, 08:32 PM
Wow you dont screw around I just sent you that set. Looks great you ready for another one? LoL
Gregb
10-06-2015, 08:48 PM
Wow you dont screw around I just sent you that set. Looks great you ready for another one? LoL
Sure, what do you have?
Gregb
tvdude1
10-07-2015, 06:57 AM
Have a real nice 621 good crt also 7 incn Sentinal very clean Nice 7 inch Teletone 8 inch Motorola very good crt wood case 7 inch Automatic with built in magnifier and 7 more nice 3 inch pilots and more sets.
tvdude1
10-07-2015, 04:42 PM
Will try to get you pictures this weekend Greg.