HW-101 Tubes

[Richard H. Arland]

Craig and Gang:

I replied to Lew directly, and I'll briefly restate what I passed to him.

The 6146W was a military ruggedize version of the 6146 designed for use primarily
with the KWM-2A transceivers used by all brances of the DoD, but in particular
with the USAF in their MARS, Giant Talk, and Mobile Comm units.

These tubes are extremely rugged and once installed and properly neutralized will
literally last forever. They are slightly de-rated for power output...something
around 75 or 80 watts, if memory serves. They can be used with virtually any
transmitter that uses 6146s in the PA. Again, the proper neutralizing procedures
must be applied.

I have used the "W" version in my HW-101 and my SB-101 over the years with no
problems what so ever.

73 Rich K7SZ

Craig Buck wrote:

> There has been a lot of discussion about this on previous threads.  I believe
> the consensus was that the various versions of the 6146 had different
> interelectrode capacitances and they were not to be mixed in pairs, i.e., one
> 6146 together with a 6146A.  I also think they were not interchangeable i.e.
> substitute a pair of 6146BAs for a plain 6146s.  The W was a special military
> version with a heavy duty filament.  I think the W presented a particular
> problem.  You might try checking back in the archive or download the heath
> service bulletins which are available somewhere on the web.  Let me know if
> you need the reference and I will check it out again.  Also the November CQ
> had an article about restoring the HW101 and I think it mentioned this.
>
> Radio K4IA
> Craig Buck
> Fredericksburg, Virginia 22401 USA
>
> FISTS CW CLUB #  6702 CC 788 Diamond #64
> QRPARCI # 2550
> K1 #470
>
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