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Help Identifying Vintage B&K Product

Nov 17th 2016, 19:18

NE6F

Joined: Jul 11th 2016, 18:01
Total Topics: 0
Total Posts: 0
I just purchased a vintage B&K single tube crystal oscillator.

I need help with product information.

Description:

12AT7 Vacuum tube
Crystal 3.563795 KHz (Chroma subcarrier)
Tunable inductor in an IF type can.
Small copper clad steel enclosure
Appears to mount on another piece of equipment

Pictures -

https://photos.google.com/photo/AF1QipPuQ93xiyE4jAsw2SjSf-Fdd7fy0ByZmQby_FgP

https://photos.google.com/photo/AF1QipP9WswaUm-Qw9z7OlgrdCPBT05zpIvBOhqPXks3



Nov 19th 2016, 21:28

AA6E

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Those photos don't come through for me. Did you mark them for public sharing?

73 Martin AA6E
Nov 20th 2016, 22:18

NE6F

Joined: Jul 11th 2016, 18:01
Total Topics: 0
Total Posts: 0
Try this Martin -
https://photos.google.com/share/AF1QipPAY8fjqg9W1cIx0t6MX_PQJhdNRnpBvr88EpoIL5zhvGEgkr-EKrVTrYXUJop93Q?key=MjM3Q05OWnE0WDNTamlsaGZfRjNmRVZhR2lBOFVR


Nov 21st 2016, 18:18

AA6E

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Aha. It looks like a "crystal calibrator" device that might be installed as an option in an older receiver, but probably that's not it if the crystal is 3.53 MHz.

I suspect it's TV-related. B&K (note NOT B&W!) made a range of TV alignment generators, and this could have been a piece of one of those.

Hopefully, someone will recognize the specific product.

73 Martin AA6E
Nov 22nd 2016, 16:35

NE6F

Joined: Jul 11th 2016, 18:01
Total Topics: 0
Total Posts: 0
My mistake Martin. It is stamped B&K. I believe it to be associated with some sort of TV test gear too. Looks like it was never used by the look of the clean wire ends. Only paid $2.50 for it.

I opened it up and made a schematic diagram of how its wired.
It might make a nice little QRP rig with a few additional modifications. Thanks for your reply.

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