75 meter rf deck

[KB5MD]

My 75 meter homebrew rf deck.....The vacuum variable is overkill but it was available...built for 75 meter AM exclusively.

[K6JEK]

Beautiful work.

[W1AEX]

That's a beauty! You're gonna make some noise with a pair of 833's!

:O)

Rob W1AEX

[W7TFO]

Nice home for those 833A's.  It ought to thump just fine.

I especially like the Gates console knobs!

73DG

[steve_qix]

Looks nice - 2 833As.  Is this modulated or a linear? I didn't see any neutralization caps, but I don't know the amp's topology either.  If you're grounded grid, no neutralization would be necessary... or maybe you're using inductance coupled neutralization... or who knows what  

modification of post:  I think I see what appears to be a neutralization cap in the side view.  Is that right?  Didn't recognize this at first.

So, tell us more.  The vacuum variable is a nice touch.  I use vacuum variables in a couple of my class E rigs of similar power to the one shown here (if it is plate modulated class C, that is).  They work very well, and are smaller for any given voltage/capacitance combination than air variables.

No matter what, it's definitely looking good.

[KB5MD]

The neutrali_ation capacitor is the two metal plates mounted on ceramic standoffs.  I have been using this transmitter for some time, but had it out of the rack cabinet to install the window and thought I would post some pics.  It is class C, grid driven and modulated by another pair of 833a's.  Steve, I've worked you with this rig. Audio drivers are p-p 6L6.  Exciter is a DX100.

[ke7trp]

It looks like it could be made from some It looks like it could be made from some T368 parts, The Vac variable, The coil form, the big cap and the parasitic resistor combo all look T368. 

Very nice!

C

[W3RSW]

Wow , what a great fabrication job.  Very beefy...  No AL811 crapster there.

Don't you think a bread slicer would be more fun to watch arc?  You might send that overkill vac. Variable my way,  Heh, heh.

[w1vtp]

Would love to see a pic of the glow from the 833s.  Especially during this cold time of the year

Al

[Todd, KA1KAQ]

Yes, that is a very serious, well-designed and built RF deck. It clearly has a good safety margin built in by the looks of the components. VERY nice work.