Wow!!! I saved about $14.30 figuring the cost of parts--approx. .50 cents!
grin
But, then figuring my design costs and labor... frown

Warmest regards,
John

"Tim Wescott" wrote in message
...
John Smith wrote:

well, that is fine, however if you don't have a 6cw4 this fix would be a
God send...

I don't know of anyone making them anymore, like the gold, the timber,
the water, and like oil, an end will come...

But these rigs can still live on...

Regards,
John

"Dale Parfitt" wrote in message
news:2nhbe.3058$Yc.2448@trnddc06...

"John Smith" wrote in message
...

Yes, and most of that would be taken care of just by choosing an "rf
fet"

as

compared to an "audio fet."
At least in the circuit I am looking at, the 6cw4 is operating at in
input
impedance of ~500K-1 meg--the fet circuit will of course, expect 1
meg--no
sweat for a even a cheap rf fet...
As mentioned, the blocking cap removes all question of danger of HV bias

(I

will supply the bias--most likely though a resistor bias arangement

(perhaps

clamping it with a diode if there is any danger of damage), and the
power
supply mentioned removes all danger of high B+ voltage...
This 6cw4 is the preamp in a frontend, signal levels are very low, there

is

a buffer stage following, with an amp behind that... certainly a signal
level compatible with a small signal fet...
The 6cw4 is a "hybrid" device... I am looking for a datasheet on it now,
I
think replacement will go quickly and be simple, probably not even

requiring

revamping of the rf xfrmr on the drain (will revamp if noticible degrade

in

preformance....)

I was just hoping someone had walked this path before and could speed my

way

and hold my hand....

At this point, I am simply wondering, "Why hasn't someone done this

before!"

Is there a big call for these devices? Perhaps I can build them and

market

them on Ebay... grin

Warmest regards,
John

Hi John,
Guess I'm just a boatanchor fan and would leave the circuits alone-
especially if there is no improvement in functionality.

Dale W4OP



$14.80 at Antique Electronics Supply, www.tubesandmore.com. At that price
there's still plenty out there -- look at the price for the 2A3, or a '45
for comparison.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com