B&K 415 Probes

[Chris K]

Got one in good working order but without the probes and cables. I'm concerned about the output jacks to the scope. I guess I'll have to fabricate something because I expected them to be standard BNC. I've looked on the bay for them but no luck so far. Does anyone have any suggestions on where I might find some or any suggestions on fabrication? Thanks,

[old_tv_nut]

Is this what you're looking for?
https://www.ebay.com/itm/32562147297...BoCl1oQAvD_BwE

[Electronic M]

The only real probe is the demodulator probe. I had one demod probe before I had my 415 and I robbed the mike cable off it for something else....So when I got my 415 I just converted everything to BNC...It was surprisingly easy.

[Chris K]

Originally Posted by old_tv_nut

Is this what you're looking for?
https://www.ebay.com/itm/32562147297...BoCl1oQAvD_BwE

That’s it!

[bandersen]

Or use these amphenol to BNC adapters. Hmm. Looks like you would need to cut down the center pin?
https://www.ebay.com/itm/125955958203

[Electronic M]

Originally Posted by bandersen

Or use these amphenol to BNC adapters. Hmm. Looks like you would need to cut down the center pin?
https://www.ebay.com/itm/125955958203

Those look like PL-259 which isn't compatible with the old microphone connectors used on the B&K 415.

Those mic connectors aren't hard to change to BNC. Just a hot lead solder joint and a nut for ground and mechanical mounting. I had some spare BNC connectos off of a junked SS monitor and they bolted right in.

[jr_tech]

Originally Posted by Electronic M

Those mic connectors aren't hard to change to BNC. Just a hot lead solder joint and a nut for ground and mechanical mounting. I had some spare BNC connectos off of a junked SS monitor and they bolted right in.

Indeed!
I have changed the connector on several vintage instruments that I use, panel-mount BNC connectors are readily available and inexpensive.

https://www.amazon.com/QMseller-Chas...s%2C330&sr=8-3

jr

[bandersen]

Aren't the mounting holes smaller?

[Electronic M]

Originally Posted by bandersen

Aren't the mounting holes smaller?

IIRC they were both the same size (roughly the diameter of a standard potentiometer mounting hole IIRC). I remember literally unsoldering and unbolting mine then bolting in the BNC connectors (as is) and soldering the wire....It was surprisingly easy.

[jr_tech]

Originally Posted by bandersen

Aren't the mounting holes smaller?

I had no problem mounting the BNC connectors on Heathkit equipment...no drilling, no shimming, they just bolted right in. Possibly other manufacturers equipment could be different

jr

[Chris K]

I ordered the female BNC connectors to convert them. Following Bobs series on alignment very closely!