[Johnson] DO NOT Solid State the Power Supply in your Ranger!!

[Glen Zook]

All of the Heath SB-Line which is tube type design
have solid-state power supplies and there are no
problems with them!

I have almost all of the original tubes in my Heath
SB-110A transceiver and the HP-23 power supply is
definitely solid-state.  That rig is over 30 years old
and is still going strong on 6 meter SSB.  Both the B+
and B++ are applied when the rig is turned on.

The same thing with my Heath SB-301 and SB-401.  The
internal power supplies are solid-state.  The old RCA
commercial two-way FM units used the rapid heating
tubes on transmit (the filaments had to go from off to
on before transmitting) and the high voltage was
applied to the plates immediately.  Again, no
problems!

The Collins PM-2 power supply that was designed to use
with the KWM-2 series is solid-state.  Again, no
problems.

And so on.  The main things that are affected are the
capacitors that may get a "burst" of higher voltage
than they were designed for.  But, as for tube damage
I have never seen any.

Glen, K9STH


--- Sherrill Watkins
<Sherrill.Watkins at dgs.virginia.gov> wrote:

Dear Ross: Consider yourself lucky! My Drake TR-4C has
solid state power supply and will seriously weaken
many of the tubes in about 12 to 18 months. Of course,
the number of on-off cycle times has a lot to do with this.

=====
Glen, K9STH

Web sites

http://home.comcast.net/~k9sth
http://home.comcast.net/~zcomco

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com