Welll,
A long time ago I tried the DowKey route, After
experiencing the "Zorch" phenomenon, I went to the
E.F. Johnson TR switch. Mainly for the power handling
capabilities, but also for the small amount of amplification
to the receiver, when in receive mode, the TRswitch RX
output is around 150 -
Thanks Jim... I have tried two times to get a Johnson TR switch on the
auction block, but both times they got completely out of reason on
price, I thought. I'll keep looking as I agree, that would be a great
solution! I had to pull the RF section off the "E" model to replace an
over looked p
Hi Rick,
Try Frank, W4FRL.[EMAIL PROTECTED]423-727-0333 He had a Johnson
switch at Shelby and I don't believe he sold it. I believe he was asking
$70.00 for it, but he likes to trade.
Be aware that all those electronic switches are TVI generators of the highest
order. My KW amps are
On 9/12/06, Don Merz <[EMAIL PROTECTED]> wrote:
The final deck has a socket for a single tube with the
large, twist-lock base and 2 plate-cap-size
connections for plate and grid caps. Not many tubes
fit that description, so I am thinking maybe an 810
goes there? The Eimac tubes are out because th
On 9/13/06, A.R.S. - W5AMI <[EMAIL PROTECTED]> wrote:
Don,
GE also made some Eimac like triodes such as the GE806 which
was a close cousin to the 250T only it had .5" caps on the grid and
plate. Of course there are other possibilities like Taylor, etc.
Correction; the 806 was made by RC
Tubes like the 75th and 100th sometimes had caps
on the grid, the modulators in my 30k1 had caps
for the grids.
I suspect they were supposed to have caps but they
were 'extra' from eimac?
I would have to dig in the books to find a circuit
for a single ended? triode final, then look at the compon
On 9/13/06, Brett gazdzinski <[EMAIL PROTECTED]> wrote:
Tubes like the 75th and 100th sometimes had caps
on the grid, the modulators in my 30k1 had caps
for the grids.
I suspect they were supposed to have caps but they
were 'extra' from eimac?
You could buy adapters that slipped over the pins
Thanks John. I sent Frank an email. I appreciate the insight on the
TVI situation. I am TVI free as it stands thanks to heavy shielding and
filtering of the BC-610-E and I sure don't want to awaken that beast! I
have great, tolerant neighbors, but I don't think they would stay that
way if I
>The final deck has a socket for a single tube with the
>large, twist-lock base and 2 plate-cap-size
>connections for plate and grid caps. Not many tubes
>fit that description, so I am thinking maybe an 810
>goes there? The Eimac tubes are out because they used
>a pin for the grid--not a full-size
Great Rick,
Let me know what happens.
73,
John, W4AWM
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Yes, I will check the fil voltage as soon as I have
time. There is no bias supply. But both decks have
large tapped resistors on them that were probably used
for bias and perhaps other voltages. You're right
about the 806--that would be a possibility--I hope not
though because I don't have any.
73
It might end up being what I make it. I don't have any
Amperex tubes that fit this descriptiuon and no 806's.
I do have 250ths and it probably would not be a crime
to go to a clip on the grid instead of a cap. Or I
could work with the 810 which I have also. But I don't
want to start buying oddball
On 9/13/06, Don Merz <[EMAIL PROTECTED]> wrote:
It might end up being what I make it. I don't have any
Amperex tubes that fit this descriptiuon and no 806's.
I do have 250ths and it probably would not be a crime
to go to a clip on the grid instead of a cap. Or I
could work with the 810 which I ha
>From the QCWA list:
> Gene Nailon, K5DLE is now a SK. He passed
> away about 20 minutes ago at his shop in OKC. The
> possiblity was from a heart attack.
As far as I know Gene was not a member of this list.
Maybe some of you knew him so I thought I would pass
this along. A loss of any brothe
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