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Author Topic: Help identifying an RCA Choke.  (Read 238 times)
AJ4CU
Member

Posts: 75




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« on: July 13, 2008, 03:32:50 PM »

Hello All!

I am repairing an SB-221 amplifier and need to replace the 1Mh rf choke that grounds the grid on one tube, in looking through my repair parts I have come across an RCA PN-204402 RF Choke however I have no RCA parts guide to identify it.
Does anyone have any info on this part??? Please help...Thanks in advance...

73  DE  AJ4CU

Hari
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WB2WIK
Member

Posts: 20547




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« Reply #1 on: July 13, 2008, 04:51:05 PM »

I'd modify the amp to directly ground the grids with very short copper strap, as I've done in every SB-220 I've ever owned.  Makes the amplifier more stable and increases efficiency slightly.

It's a good amplifier, save that engineering oversight.

WB2WIK/6
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