why no RCA jack on my 200 amp board?

[citysoundman]

I'm looking at my 200 amp pcb - the reed bar pickup cable is soldered directly to the board. There's also a resistor connected to the signal lead. Can anyone explain what this means?

From what I've been reading, I thought all 200's had an RCA jack for the pickup cable. BTW mine is an early amp version, from 1968, serial 48147. pic attached.

[citysoundman]

And btw my amp has a very loud hum. Is there anything specific to this pcb that I should be aware of? I plan on shielding the AC mains going to the transformer. Thanks!

[pianotuner steveo]

Re hum: possible bad ground connection somewhere. Or, a very worn out volume control, but check for bad grounds first.

[citysoundman]

Thanks Steveo, I really appreciate your help! Is there a way to test or check the volume pot? It seems to function well, and isn't noisy when turning it.

[pianotuner steveo]

The only way I know if to tell if the hum is caused by the volume pot is to replace it unfortunately, but I have seen this to be the cause of hum in 2 Wurlitzers over the years. ALWAYS check for simpler solutions first, such as a bad ground somewhere.

[DocWurly]

The RCA jacks were NOT in the A models. They were in the 200 models.

But!  Your instrument is astonishing!! The first 200 had serial number 48001, or so. Yours is 48147, which means it is hangin' out grabbing a drink and a smoke with the prototypes. I'd LOVE to know all the date stamps in this instrument!  Please read here, and pay special attention to any initialed handwritten date on the lowest keys.

https://docwurly.com/wurlitzer-ep-history/the-date-of-your-wurlitzer-electric-piano/


I think it is in the realm of possibility that the atypical wiring we are seeing here is original. But I think it's unlikely, given the other evidence of recapping here. The early 200's usually had the RCA jack on a raised platform, and sometimes those are a little flimsy, 55 years later. Maybe this is just a fix.