6/23/2022
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Publication |
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Board Price |
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Looking for replacement to Radio shack RS273-1378 audio transformer, look at 42M002-RC OR 42TL002RC transformer transformer available at Mouser. |
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N0SS AUDIO FIX F OR K2 cLICK HERE FOR: (NOTES ON k2 FIX) AND (FOR BOARD LAYOUT). |
$4.00 |
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W2MY/5 Audio Break Out Box |
$7.00 |
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AA-10A-1 25 Watt Audio Amplifier by John Keith details at http://www.bwcelectronics.com/projects/AA10A090.pdf |
$16.00 |
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The SM0VPO 4 watt audio amplifier . author has requested I do not sell the boards. |
00.00 |
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Motorola replacement 5W audio board for older style expernal speaker |
$8.00 |
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ARRL HB CHP28 FIG.10 (92) |
Audio amp with AGC (also CHP28 FIG.15 (88-91)) |
$4.50 |
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ARRL HB CHP28 FIG.13 (92) |
An expanded headphone mixer (also CHP28 FIG.18 (88-91)) |
$4.50 |
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ARRL W1FB QRP NTBK 1991 FIG. 3-22 |
Active CW filter |
$6.00 |
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73's May97 |
Audio multiplexer for your frequency counter for measuring CTCSS tones by KB8XI |
$6.50 |
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73's Nov96 |
Magical audio filter using MC1458 &MAX295 IC1s BY Jim Pepper |
$7.00 |
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73's May94 |
Cripe hyper audio filter |
$5.50 |
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73's Dec93 |
Deluxe COMM audio by Curry |
$8.50 |
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73's Jul93 |
Universal speech processor |
$5.25 |
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73's Feb93 |
Switched capacitor audio filter tone processor |
$5.00 |
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73's Nov92 |
The noise remover, basic noise limiter |
$3.50 |
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73's Nov92 |
The noise remover, basic noise limiter, plus filter |
$4.25 |
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73's Nov92 |
The noise remover, basic noise limiter, plus filter & amp |
$4.50 |
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73's Oct92 |
Noise blanker (larger BD) |
$4.50 |
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73's Oct92 |
Noise blanker (smaller BD) |
$3.50 |
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73's Aug92 |
Digital alc |
$9.00 |
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73's Jun91 |
HW-8 audio amp |
$3.50 |
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73's Jun91 |
Pseudo CW filter |
$6.00 |
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73's Dec90 |
Audio power tape recorder controller |
$4.50 |
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73's Sep90 |
Solution AGC circuit |
$5.50 |
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73's Apr90 |
Blanker for TS940S |
$4.50 |
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73's Feb90 |
Contest quality headset and MIC amplifier |
$4.50 |
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73's Dec89 |
VOX for THs |
$3.00 |
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73's Jul89 |
4 IN/5 out audio mixer |
$9.50 |
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COMM QRTRLY Winter 97 |
Logarithmic audio speech processor by W. Sabin (two board set) |
$14.50 |
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CQ Jul97 |
WIFB QRN 'squelcher' MK-III project |
$5.50 |
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CQ Nov96 |
Desk top microphone preamp using 2N7000 FET by Rich Littlefield |
$3.50 |
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CQ May96 |
WIFB 'squelcher' noise eliminator MK-II |
$5.75 |
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HR Apr89 |
Multiband speech processor |
$4.50 |
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NUTS&VOLTS OCT'07 |
Analog mixed and matched, a 4input/output distribution amp by Cicchinelli, 4 board set |
$18.00 |
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NUTS&VOLTS Mar03 |
$11.00 |
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NUTS&VOLTS Dec97 |
MIDI to synthesizer interface by Thomas Henry (source code available from http://www.prairie.lakes.com/~map/ ) |
$13.50 |
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NUTS&VOLTS Jul93 |
Parabolic microphone amplifier by Charlton |
$4.50 |
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PE May98 |
$8.50 |
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PE Dec71 |
Distortionless audio compressor ( click here article) |
$7.00 |
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PE Sept' 74 |
Build a 400 watt stereo audio amp the Ampzilla 2 board set |
$33.00 |
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QEX JAN/FEB 08 |
A squelch amplfier by KE5KSC |
$7.50 |
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QEX Sep/Oct01 (Tech Notes) |
$5.50 |
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QEX Jul85 |
Morse code shaper |
$12.50 |
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QRPp Summer98 |
Switch capacitance audio filter by Jim Pepper |
$6.00 |
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QST JUL 19 |
AUDIO AGC BY LITTLEFIELD (DESCRIPTION) |
4.50 |
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QST Feb 17 |
An ocvillator for MCW by wb9ybm (CKICK HERE) |
$4.00 |
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QST APR 16 |
CW TONE DETECTOR. Complete set of parts and board |
$10.00 |
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QST APR16 |
CW Tone Detector Boards (click here) |
$4.50 |
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QST Aug15 |
headphone amplifier |
$7.00 |
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QST Jun08 |
Audio interface for field/contesting by K0IZ (SEE PICTURE) |
$8.50 |
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QST JAN07 |
Simple computer to transmitter morse keyer interface click here |
$4.00 |
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QST JUN06 |
Low cost active audio filter for CW using LM324 by WA9PYH |
$5.00 |
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QST Jan05 |
$8.50 |
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QST Dec02 |
$13.50 |
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QST Jul02 |
$5.50 |
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QST Feb02 |
CW generator and audio distribution system by Rynone |
$8.00 |
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QST Dec00 |
Noise canceling with electret condenser microphones by Spices |
$4.50 |
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QST Nov99 |
$7.50 |
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QST May00 |
Improving the hamtronics R139 VHF weather- satellite receiver interface by Jim KOCSIS |
$4.50 |
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QST Jul98 |
$6.00 |
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QST Nov97 |
$7.00 |
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QST Nov95 |
AMSAFID, an automatic microphone switcher amplifier filter integrator distributor by Mandelkern |
$7.00 |
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QST Jun95 |
Continuously variable bandwidth audio filter using MAX295 IC'S by Bramwell |
$7.00 |
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QST Mar95 |
Audio break-out box by Spencer |
$7.00 |
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QST Feb95 |
AGC audio preamp by Miller |
$4.50 |
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QST Dec94 |
Spencer 1 W AF amplifier |
$4.50 |
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QST NOV 94 |
Two tone generator using two transistorts socillatoes. |
$5.50 |
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QST NOV 92 |
Dual audio speakers by |
$4.50 |
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QST Dec91 |
Quality desk mike |
$4.00 |
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QST Aug89 |
Desk mike audio booster preamp by Demaw (also ARRL HB'96 page SSM2165 speech compressor mini-kit, (2) OP113, SSM2165, 78L05, L1, and P C board DISCONTINUED 22.29) |
$4.50 |
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QST Oct83 |
A tunable CW filter |
$6.00 |
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QST JULY 1982 |
EQ200 by Heil |
$6.00 |
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R.CROWLEY |
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ANALOG DEVICES SSM2165 |
SSM2165 speech compressor mini-kit, (2) OP113, SSM2165, 78L05, L1, and P C board DISCONTINUED |
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