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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 17th Dec 2021, 7:04 pm   #1
Andrew B
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Default Taylor 68A alignment.

Has anyone ever done a calibration of the scale and bands on one of these?
The one I have works perfectly, the only time I have been inside it was to change out the Belling-Lee for a reliable N-type RF connector.
I noticed that the scale is a bit out on some bands, especially the low ones, is it an easy job just to tweak the coils and get the scale to read correctly?
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Old 17th Dec 2021, 8:18 pm   #2
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Default Re: Taylor 68A alignment.

The old workshop sig gens were not at all precision instruments, nor did they have particularly fine tuning. In % terms what is a "bit out"? Is this for your 1977kHz project?

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Old 17th Dec 2021, 8:44 pm   #3
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Default Re: Taylor 68A alignment.

My 68A, set as close as I can to 2000kHz, is actually radiating at 2010kHz, though it is still warming up. I think that's pretty good for that type of sig gen . As for re-alignment, maintaining the tracking is the key issue and I've not tried it on this unit.

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Old 18th Dec 2021, 10:50 am   #4
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Default Re: Taylor 68A alignment.

Quote:
Originally Posted by Bazz4CQJ View Post
Is this for your 1977kHz project? B
Not really Bazz, I only noticed the offset when I connected up a frequency counter to set 470kHz, a quick tune around showed waverings. Thanks
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Old 18th Dec 2021, 11:52 am   #5
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Default Re: Taylor 68A alignment.

Calibrating your Taylor should be straightforward. I was able to calibrate my Advance E2 earlier this year with a frequency counter. I'm confident to say that it is more accurate now than when it left the factory.

You'll need to identify which capacitor/coil pair sets each band. Lining up the pointer and dial might be tricky; I have not seen the inside of a Taylor so I can't comment.

If it is anything like my E2 your Taylor might just need a long reach screwdriver to undo the pointer.
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Old 18th Dec 2021, 1:14 pm   #6
Bazz4CQJ
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Default Re: Taylor 68A alignment.

Quote:
Originally Posted by Andrew B View Post
Quote:
Originally Posted by Bazz4CQJ View Post
Is this for your 1977kHz project? B
Not really Bazz, I only noticed the offset when I connected up a frequency counter to set 470kHz, a quick tune around showed waverings. Thanks
If, by waverings you mean instability, you might think about switch cleaner first before more involved work.

I left mine on for 3 hours night and it barely moved as it warmed up on 2010kHz. They are a very good old workshop sig-gen. I have been inside, but not to change alignment.

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Old 18th Dec 2021, 5:18 pm   #7
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Default Re: Taylor 68A alignment.

I don't mean fault sort of wavering. I mean between the ranges, 470kHz was 467 on the scale, 1.8mHz was 1.9 on a different scale, same on 3.5mHz was 3.6 on another scale, just little niggles, too perfectionist
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