B&K 1250 NTSC Generator
 

I picked up one of these real cheap, and I think I found out why. Power supply voltages look good, but I don't think the master clock is running. Anyone have a schematic I could bum, either a copy or email scan? Or know of a place it's posted online? Thanks for any help.

Kevin

B&K 1250 NTSC Generator
 

Hi Kevin,
I have a 1250 that the video works on, but not the audio. It has the original manual which includes the schematics. I have it packed up because I was about to list it on another forum when I came across your post. If you'll give me $10 for the box,packing and tape plus actual shipping cost I will send it to you. If you want to figure shipping cost the box is 23X17X11 and the package weighs 15 lbs. I have pics I can email of the unit working. If interested email me at [email protected]. I just dont need it anymore and I would rather not send it to the landfill if someone can use it.
Ray

B&K 1250 NTSC Generator
 

I forgot, my zip is 32310.
Ray

Ray,

Thanks for the offer.

As much as I'd like to have that manual, I don't think I can justify spending another $30 on a parts unit.

Kevin

I guess I should have never overlooked the obvious. I called B&K out in CA, and a very nice tech support guy emailed me the schematic N/C. Pretty good customer support considering this unit is over 30 years old. :thmbsp:

Kevin

I got mine working. The crystal master oscillator would not run at first. :scratch2: So I unsoldered the oscillator transistor to check it (checked good), then soldered the transisitor back in and the darn thing took off. :dunno: Then I cleaned all those switch contacts with some Deoxit, and all seems fine.

These are very nice pattern generators that likely cost big bucks in their day. Hopefully someone can use that one Ray has. I can't imagine it will be too hard to get the audio oscillator working. That's a completely separate analog circuit from the video.



Kevin

Glad to hear you got it working Kevin.
If anyone is interested in the one I have, just email me at [email protected] . I have used it extensively for the last 18 years but I just don't need it anymore and don't want to throw it away.
Ray

Ray,

I'd suggest you list yours in the classifieds here on this site, as well as over on the Antique Radio Forum classifieds.

Kevin