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  1. Ham-Amplifiers
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8170 AMP

vaj4378
 

I posted a few pictures of my 8170 amplifier.

-Steve
Phil Clements
 

I posted a few pictures of my 8170 amplifier.

-Steve
Steve, I am impressed! What a fine piece of workmanship. Please add a
pix of the schematic. I assume it is a 20m through 10m tank circuit?

(((73)))
Phil Clements, K5PC
Steve Cook
 

Hi Greg,
?
To be honest, I don't recall ever running this thing on 10 or 15, although the grid circuit did resonate nicely.??I used the AG6K circuit which incorporates a trifilar input transformer and a 450 non-inductive resistor in conjunciton with a roller coil to resonate the input cirucit.? This thing put out a heap of fire -- 20dB and change.
?
-S

badgerscreek wrote:
Nice job Steve.

How successful were you in resonating the grid on 10 through 15
meters? Do you bypass the grid Roller inductor on 10 through to 15 meters?

The stray L with the interconnecting wires caused me all sorts of
trouble even though the Grid lead length was close to zero.

I also had to use a 1000 ohm grid R with a 20:1 transformer to develop
full grid drive voltage. Well i only had a 100 watts of clean low IMD
power. I am still unhappy with the grid circuit.

My suggestion to anyone contemplating building a 8170 amplifier is
too sort the grid circuit out first. That and the sheer weight is the
only problems you will have. Some kind of filament regulator that can
switch during RX:TX would also be advisable especially if you running
it off single phase.

Greg

--- In ham_amplifiers@yahoogroups.com, "vaj4378" > wrote:
>
> I posted a few pictures of my 8170 amplifier.
>
> -Steve
>


Cheap Talk? Yahoo! Messenger's low PC-to-Phone call rates.
Steve Cook
 

80 thru 10 actually... but I ran it mostly on 40 meters in the combat zone.? It was able to produce a 40dB over S-9 signal on 40 meters from Tucson, AZ?into Somis, CA...
?
Amazing...
?
-S

Phil Clements wrote:
> I posted a few pictures of my 8170 amplifier.
>
> -Steve

Steve, I am impressed! What a fine piece of workmanship. Please add a
pix of the schematic. I assume it is a 20m through 10m tank circuit?

(((73)))
Phil Clements, K5PC


Any questions? Get answers on any topic at . Try it now.
FRANCIS CARCIA
 

very nice job! How about a schematic

Steve Cook wrote:

Hi Greg,
?
To be honest, I don't recall ever running this thing on 10 or 15, although the grid circuit did resonate nicely.??I used the AG6K circuit which incorporates a trifilar input transformer and a 450 non-inductive resistor in conjunciton with a roller coil to resonate the input cirucit.? This thing put out a heap of fire -- 20dB and change.
?
-S

badgerscreek com> wrote:
Nice job Steve.

How successful were you in resonating the grid on 10 through 15
meters? Do you bypass the grid Roller inductor on 10 through to 15 meters?

The stray L with the interconnecting wires caused me all sorts of
trouble even though the Grid lead length was close to zero.

I also had to use a 1000 ohm grid R with a 20:1 transformer to develop
full grid drive voltage. Well i only had a 100 watts of clean low IMD
power. I am still unhappy with the grid circuit.

My suggestion to anyone contemplating building a 8170 amplifier is
too sort the grid circuit out first. That and the sheer weight is the
only problems you will have. Some kind of filament regulator that can
switch during RX:TX would also be advisable especially if you running
it off single phase.

Greg

--- In ham_amplifiers@yahoogroups.com, "vaj4378" > wrote:
>
> I posted a few pictures of my 8170 amplifier.
>
> -Steve
>


Cheap Talk? Yahoo! Messenger's low PC-to-Phone call rates.

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