[Kenwood] Help - Removal of 12BY7A in T-599D
Les Severson
[email protected]
2003年11月14日 23:44:49 -0600
Hi Jeff,
I'm not familiar with the T-599D but in all other Kenwood rigs that I've
seen with a 12BY7, ALL that is necessary
is to pull the tube shield straight up over the tube. The little tab
connected to the chassis is not physically connected to the shield
but merely slides in under the shield. It may be a little hard to pull
up. By the way, the failure of a 12BY7 is not uncommon and should be
the first tube to try substituting. Other low output common problem can
sometimes be traced to the voltage
doubling capacitor...(easy replacement) Check your HV on your panel
meter and make sure it's still around 800V.
Your 6146s could be softening it they're old but It would be VERY
unlikely that they would both would completely fail at the same time.
It's most likely that something feeding the 6146s failed... either
voltage or rf drive.
Good luck & 73,
Les, W�OJH
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jdraughn wrote:
>Good evening all,
>>OK I give, how do you get the 12BY7A Driver amplifier
>tube out of the radio. I have not been able to get the
>tube out of the metal shield that fits around the tube and the
>shield is fastened to the tube socket buy a small strap that's
>too short to allow the tube to be layed over and pushed out.
>>What am doing wrong?
>>BTW anyone have a copy of the service manual or know of a source for one?
>>I can only get about 5 watts out of the rig.
>>Thanks,
>Jeff, N0OST
>>- - -
>>Your moderator for this list is:
>Larry Wilson KE1HZ [email protected]
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