Yes ....I agree 100% to solid state the 5R4 no so sure about the 5U4
Yes the 6146's are , beleive it or not very happy ( in SSB ) to get
1000 -1100 volts or more on the plate ....it makes the screen very happy ,
it reduces the screen current and screen dissipation .....when you know
that most 6146 are going bad from excessive screen current .......if the
plate voltage is too low , the screen start to think it is the plate and
intercept too much current , producing "secondary emission " ( the screen
is red hot like a 2nd filament ) .
I have been using 1200 volts on a KWM-1 since 1965 ( by using capacitor
input filter ) .resulting in 150 watts in SSB with no problem for many
years ........only very few 6146's dont like it .
73
Wn4i
Yves Pautard
5833 Dryden rd.
West Palm Beach
Florida 33415.....561-689-8819
----- Original Message -----
From: "JAMES T BRANNIGAN" <[email protected]>
To: <[email protected]>; <[email protected]>
Sent: Tuesday, May 21, 2002 9:01 AM
Subject: Re: [Collins] 516f2
> First, solid state conversion is not a bad thing.
> The unloaded voltages are high, how much is WAY too high?
> Jim
>>> > bought a 516 on ebay,shame on me, got power supply and found it hah been
> converted to solid state using PART of one of the published converions
plus
> a bunch of other changes that are very hard to follow. checked voltages,
WAY
> to high. need info as to who can go thru and rebuild or source of detailed
> converson to re work my self. would really like to have some one do it,as
> time is one thing I don't a lot of. any help on this or even a another
516f2
> if anyone has one for sale.
> > thanks for taking the time to read this and all who helped with the
> question about the inner connect cables...THANKS!
> > dale K8PEO
> > Sponsored by the Collins Radio Association
> > http://www.collinsra.com>> Sponsored by the Collins Radio Association
>http://www.collinsra.com>