[Drake] 6JB6A tubes

[hbrnut at earthlink.net]

Garey,

I wouldn't rule out the possibilty that they had more than one supplier. That would explain the difference in our results. It's been a long time since I used them, but I THINK I had decided at the time that they were manufacured by G.E.

Darrell



>Darrell -
>
>Interesting...  The International tubes I tried would neutralize with no 
>problem, but were very hard to drive, particularly on 15 and 10M.  I 
>attributed it to the considerably different internal lead structure 
>compared to US made tubes.
>
>Some brands require considerably different neutralization capacitances.  
>I'd just as soon avoid making changes to the transmitter though until it 
>becomes necessary.  So far "good" brand tubes are still readily available.
>
>73, Garey - K4OAH
>Atlanta
>
>Drake C-Line Service Manual
><http://www.k4oah.com>
>
>
>
>hbrnut at earthlink.net wrote:
>
>>I have never found a brand of tubes that wouldn't work, although it is sometimes necessary to change the value of the fixed capacitor across the neutralizing capacitor. This includes all of the major branded ones as well as some oddball ones. I have used the "International Service Master' tubes successfully.
>>
>>73,
>>Darrell, WA5VGO
>>  
>>
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