[Collins] 30L1 problem

[Rodger]

Cal,

If you only have 900 VDC then something is going on in the power supply 
section or with the metering circuit itself.  Any chance you have it 
wired for 240 and are running it on 120?  There is a mistake in the 
wiring change from 120 to 240 volt operation in the original version of 
the manual, it is corrected in later versions.Can you confirm the 
internal meter reading with another voltmeter?    If the input voltage 
is wired correctly and you truly only have around 900 VDC HV then either 
your transformer has an issue causing low voltage (not very likely) or 
there is something going on with your new rectifier board.

If the HV is present and correct, what is your idling current for the 
811A's (tripped to transmit but no drive)?

73, Rodger WQ9E

C E wrote:
> All:
> I recently upgraded my RE 30L1 with that single board
> retrofit kit.  I have never tested or applied power to
> the amplifier before until I installed the kit.  I am
> having some problems.
>
> 1) The voltage seems a bit low (about 900 VDC on the
> meter). From what I gather, the voltage measured
> should be around 1600 VDC.
>
> 2) Power output is abnormally low (around 10 W) with a
> drive of about 35W.
>
> I'm fairly sure that the hv rectifier and cap board is
> fine.  Can gassy/bad 811a tubes cause this? Thanks.
>
> Cal, N6KYR
>
>
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