Author Topic: Question Bandmaster part (Read 2716 times)

Oddvar · « **on:** February 19, 2019, 09:30:42 am »

Hi. I am wondering what part this is, is it a K1104 Raysistor Opto Isolator? -If not, any Ideas?

sluckey · « **Reply #1 on:** February 19, 2019, 10:13:51 am »

It's a Fender style tremolo optoisolator. It's just a NE-2 lamp bulb and a photocell in some shrink tubing. The lamp flashes at the tremolo speed and causes the photocell resistance to change at the tremolo speed. Fifth item down on this page...

https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&template&thispage=Lamps&ORDER_ID=!ORDERID!

Oddvar · « **Reply #2 on:** February 19, 2019, 10:21:50 am »

Thanks again Sluckey, could you recommend a OT for the bandmaster fro Hoffman also?

sluckey · « **Reply #3 on:** February 19, 2019, 10:32:23 am »

Oddvar · « **Reply #4 on:** February 28, 2019, 07:37:10 am »

Bought the tremolo opto isolator from Hoffman. Are they directional? I see others has a mark what way should be closest to the tube sockets?

sluckey · « **Reply #5 on:** February 28, 2019, 09:14:11 am »

Yes. Hoffman's description tells you which end is which.

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