[Drake] 6JB6 TUBES

[Dan W. Dooley]

ditto on the MFJ259.  Also indespensible for really tuning up an antenna 
especially ones such as the multiband verticals.

BTW, I ended up converting my T4XB to 6146's a few years ago and have been 
pleased with the results.

Dan W. Dooley WB5TKA
Dooley's Treasure Chest
  email: dandooley at pipeline.com
  Web: http://www.dooleystreasurechest.com


----- Original Message ----- 
From: <W4AWM at aol.com>
To: <drake at mailman.qth.net>
Sent: Wednesday, February 15, 2006 1:52 PM
Subject: [Drake] 6JB6 TUBES


> Ladies and gentlemen,
>
> What all this comes down to is that most tubes will work but you you need 
> to
> take care tuning up, that is, keep the drive down, tune up quickly, not 
> over
> 10 seconds at a time if you can help it, and let it cool if it takes you
> longer. Then bring the drive up and check quickly for a final dip. It is 
> then
> advisable to back the drive off slightly. The object here is not to run 
> the pants
> off the poor sweep tubes. They are not designed for it. The last 10 of 15 
> watts
> you are trying to squeeze out of the rig in not going to make one bit of
> difference at the receiving end, but it will certainly dent your pocket 
> book when
> it comes time to buy a new set of finals.
>
> If you want to do antenna work, get yourself a good bridge, set the tuner 
> or
> matching device with that and save the finals for operating. I am not
> promoting stuff, but the MFJ 259 (  ) is the best investment you can make 
> for a shack
> accessory in my opinion. Get everything set with that, connect the rig, 
> and
> you will find that any further dipping is hardly necessary.
>
> If you can place a small fan on top of the rig exhausting outward, this 
> will
> help, too.
>
> I have my original R-4A / T4X rig that I bought at Freck Radio and Supply
> Company in Asheville, NC back in the early 60s. I am still running the 
> original
> finals. That has to tell you something, and yes, the rig has many hundred 
> hours
> on the clock.
>
> 73,
>
>  John,  W4AWM
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