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Re: [Amps] RPC 3-500 tubes

To: "'Robert Wood, P.E. \(retired\)'" <>, <>
Subject: Re: [Amps] RPC 3-500 tubes
From: "Peter Voelpel" <>
Date: Tue, 5 Jan 2021 00:56:55 +0100
List-post: <>
For more power you will need more drive.


-----Original Message-----
From: Amps [] On Behalf Of Robert Wood,
P.E. (retired)
Sent: Dienstag, 5. Januar 2021 00:01
Subject: [Amps] RPC 3-500 tubes


Recently purchased set of 3-500 tubes Made PRC and installed in AL82 amp

This AL82 had the Zener diodes replaced with diode string before I purchased
it YEARS ago.

Old arrl handbook shows 3-500 (single tube) with 30 watts input (GG-class B)
with 110 ma grid current.

My AL82 shows about 100ma grid current, two tubes, 80 watts out on driver
rig and about 1KW out.


Anyone else running set of Chinese 3-500 and could share grid current


and yes this is all issue because can't get power out 


73 W5AJ



Midland, Texas


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