[TenTec] centurion

[Bob McGraw K4TAX]

In general the Centurion in Standby mode should show 0 ma plate current 
and 3100 volts for the high voltage.  In transmit idle mode {no signal}  
the plate current should be about 75 ma depending the quality of the 
tubes.    Anything greater than this is an indication that the bias is 
not correct.    Full output occurs about 0.8 amps {800 ma} plate current 
and 2600 volts for high voltage.  Be aware the most critical value for 
correct tuning and long tube life will be the grid current value of 260 
ma MAXIMUM.  Drive from the transceiver and proper adjustment of the 
LOAD control is critical in regard to controlling grid current. Never 
allow the grid current to exceed 260 ma.    For SSB the grid meter 
should not swing any higher than 120 to 130 ma on voice peaks.    Always 
adjust the TUNE control for maximum output.

73
Bob, K4TAX




On 8/8/2018 9:03 PM, A R wrote:
>
> Is the 190ma plate current with the amp in standby mode?
>
> W7GIF
> ----- Original Message -----
> From: Rodney<mailto:w3krq at dejazzd.com>
> To: Discussion of Ten-Tec Equipment<mailto:tentec at contesting.com>
> Sent: Wednesday, August 08, 2018 6:28 PM
> Subject: Re: [TenTec] centurion
>
> no it was 190 m with no drive and tubes got red
>
> -----Original Message-----
> From: Bob McGraw K4TAX
> Sent: Wednesday, August 08, 2018 8:53 PM
> To: tentec at contesting.com
> Subject: Re: [TenTec] centurion
>
> Is this idle current with no signal?   If so it is about correct.
>
> 73
>
> Bob, K4TAX
>
>
> On 8/8/2018 7:42 PM, Rodney wrote:
>> I was on my Centurion talking and looked at my plate current it was
>> resting at 190m but the amp was putting out 1200w so tubes I think are ok.
>>
>> ---
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