Make sure your driver is putting power on the band in question. Happened
to me once. Never assume it is.
Paul K0UYA
On 10/25/2025 10:02 PM, phil greene wrote:
New to me Centaur amp with 572 tubes of unknown health.
Only has output on 80 meters (~500w)
10-40 meters have plate and grid current but no output
Load capacitor has no effect on any band
Tuning cap will dip grid current
Tried dummy load with same result
All resistors check good, and have cleaned band switch and it did not appear
cracked nor damaged.
Ideas on where to start troubleshooting?
N4ZSA
Sent from my iPhone
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