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Al Squires K4CKS is a homebrew artist ! So I've decided to dedicate a
page to his AM creations !
How about this for a neat homebrew AM transmitter
? Al, K4CKS built this pair of 4CX250's modulated by a pair of 811A's.
The modulator deck with a nice window so you can see those
811A's glow red !
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Another beautiful homebrew transmitter by Al,
K4CKS! Here's the particulars right from the homebrew artist himself....."The Tx puts out about 35/40 watts.
It really needed a larger loading cap. I used a 2 section b.c. job and padded it with a fixed cap.
It has a 5763
osc driving a 6146 and gets about 3 ma drive.
The meter switch has 3 positions, Pa grid, Pa cath. and Mod cath.
The
HB p.s. has a speaker and muting ckt.
It's an old TV transformer with the sec bridged and Fullwave. I get about 300
and 600 volts
Speech amp is 12 AX7, 6c4 driver and push pull 2E26.
Mic is Motorola low imp dynamic."
A look inside the homebrew 40 watter......I can't wait
to hear it on the air !
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Full length view of Al's "Big" rig....a pair of 4CX250's modulated
by a pair of 811's. RF deck on top, modulator deck in the middle and power supply on bottom. Not shown in
this photo is the SP-600 receiver at the top of the rack....brought back from WWII by Bo W4TGL. (pictured on "Local Ops" page)
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When 100 watts of AM on 3885 Kc is all that's needed, Al can
run this beautiful homebrew tabletop transmitter. Built around the venerable 4D32, it makes a great companion for the
HQ-129X receiver!
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How about a vacation/camping AM portable that covers 40 mtrs
? How's this for a nice compact unit?
A single 6146 modulated by a pair of 2E26's give about 50 watts of plate modulated
AM on 7290Kc.
The receiver is a modified ARC-5 unit from WWII.
The complete description can be found on the "Local Ops" page.
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Here's OM Al at his workbench with the portable rig.
I can almost see the wheels turning ..... "what will I build next ?"
Hey Al...how about a 160 mtr AM transmitter for your favorite TopBand operator (KX4R) ?
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