[Johnson] Re: DO NOT Solid State the Power Supply in yourRanger!!

[Jim Brannigan]

I only owned one "sweep tube" radio a Yaesu FT101EE.
The finals seem to last forever......in contrast to various commercial and
homebrew 6146 radios that seemed to require replacements on  a regular
basis.
Ater many years I figured it out. (on a subjective basis)
I tended to "baby" the sweep tube finals, but abused the 6146's, because
they "could take it"

Jim


> First, I'd flip the fan over. Secondly, maybe take a look at how you are
> tuning up, what kind of loads are on the rig, how hard you drive it, and
how
> fast you can efficiently tune it. Also, check careful the value of cathode
> and screen resistors in the PA. 6JB6's are not "key-down" CCS-rated tubes,
> and were never intended to be. Depending on how the rig is used, and even
> more importantly, how often and how quickly retunes are done and what kind
> of load it's run into, 18 months might be a good service life. For the way
> my particular TR-4 gets used (twice weekly nets, good antenna match,
always
> used on the same freq/band, gently driven, almost never retuned), 18 years
> is probably more like it!  :-)
> 73, Jerry W5KP