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QST July 09, four output bench power supply, two board set, 4 identical positive lm2575t-3.3 and a single negative supply by Cicchinelli |
$11.00 |
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1985 HAND BOOK 220 Mhz converter |
$5.00 |
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28 volt high current power supply (95 HB fig 11.5 |
$8.50 |
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7.60 |
A lead acid battery charger by Lewis QST May 01 |
$13.50 |
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7.63 |
QST jun94 over-voltage protection AC generators |
$5.50 |
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Series-regulated power supply 4.5 to 25 v, 2.5 a, by Sabin |
$7.50 |
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7.52 |
13.8v, 5a power supply by Benspencer |
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ARRL HB chp32 fig 81 low noise preamps 10 GHz ATF (on g-10) |
$4.50 |
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13.8 v 40 a switching power supply (QST Dec 98) |
$20.50 |
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28v high current 10a power supply |
$9.00 |
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7.64 |
Crowbar circuit/kit See New Items kit (click here for details) |
$18.00 |
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R2 receiver also QST 4_1993 |
$8.50 |
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Inexpensive SSTV with computer (see modems QST Jan 94) |
$5.50 |
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2 meter brick amp using s-av7 (25w) or s-av1 7 (50w) |
$9.00 |
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QST Mar 00 QRP 40 meter tuna tin 2 transmitter |
6.00 |
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Crystal filter evaluation board (QST Mar 90) |
$7.00 |
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Continuously variable bandwidth CW audio filter (QST Jul 95) |
$7.00 |
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12.31 |
VHF gaas FET preamp for 430 mhz 15 db gain, .55nf |
$6.00 |
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Micro T 2 SSB transmitter by Campbell |
11.50 |
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12.33 |
10 GHz preamp, (QEX Dec '92) on .015 Teflon. |
$7.00 |
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12.5 |
Rock-bending receiver for 7mhz (QST Aug 95) |
$7.00 |
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Wide band MMIC preamp using Mar-6 (QST Nov 97) |
$5.00 |
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Super regenerative VHF receiver w/ squelch (QEX Sep/Oct00) |
$10.00 |
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13.3 |
Pebble Crusher Two (fig 4-8) |
$6.00 |
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TAK-40 SSB transceiver by Veatch, 4 board set QST May 2008 |
24.50 |
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Norcal Sierra 80-15m CW transceiver (QRP); main board and four sets of band boards |
$33.00 set |
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$19.50 Set |
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Simple regenerative HF receiver for beginners (QST Sep 00) |
$6.00 |
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Quick and easy CW with your PC (QST Jan 95) |
$7.00 |
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Expandable headphone mixer |
$4.50 |
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Simple 10 minute timer using 4017 and 555 |
$4.50 |
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Audio break-out box (QST Mar 95) |
$6.00 |
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SWR detector audio adapter (QST Jul 94) |
$4.50 |
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Tandem match directional wattmeter (QST Jan 87 & QST Jul 93) discontinued |
DISCONTINUED |
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ICOM/Ten-Tec/Yaesu RS232 interface (QST Feb 93) board and 7417 and Max232 ic's |
$11.00 |
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Kenwood RS232 interface (QST Feb 93) board and max232 and four opto couplers |
$15.50 |
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TR time delay generator |
$7.00 |
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24.3 |
SWR puckup board. |
$4.50 |
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24.3 |
QST Jun 95 build simple led SWR indicator by K1KP the led indicator board |
$4.50 |
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24.16 |
24.19 |
QST Apr 05 six port remote antenna switch board & eyelets by KO4NR |
14.50 |
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24.22 |
24.24 |
Kenwood serial radio interface (board, opto couples, mx232, 7805) |
$15.50 |
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24.21 |
24.23 |
ICOM/Ten-Tec serial radio interface (board,7417, mx232, 7805) |
$11.00 |
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24.23 |
24.25 |
Simple serial radio interface using two mosfets |
$4.50 |
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24.35 |
$8.50 |
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24.40 |
Audio interface for field/contesting by K0IZ (see picture) QST 6/08 |
$8.50 |
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25.44 |
Two tone generator , republished form 1988 HB chp 25-39 |
$7 |
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25.50 |
$4.50 |
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Active attenuator for fox hunting (QST Nov 92) |
$4.50 |
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Marker generator with selectable outputs |
$4.50 |
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Measure inductance and capacitance with DVM; Inductance meter board $5.50, capacitance meter board $5.50 |
$5.50ea |
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26.5 |
Two transistor crystal controlled signal source |
$4.50 |
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Dip meter with digital display from QEX Oct 93 two board set click to view boards |
$17.00 |