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$ QRP POWER SUPPLY - This unit will eliminate receiver hum and chirp and buzz in your transmitted signal caused, by.power supply deficiencies. $24.95 QRP VFO - Companion VFO plugs directly into QRP!.: transmitter above for stable variable frequency control from 7.0 to 7.2 MHz. Switch selects crystal or VFO frey!e.ncy control (crystals and VFO not included). $24.95 QRP TRANSMTTER - Work the world on 5 watts,with this Transm~tter on 40 meter CW.
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$24.95 FREQUENCY STANDARD - The MFJ-2WBX provides strong preclse markers every khz well into the VHF reglon. Unintelligible signals become readable as you sl~de the selectivity switch to optimize the audio bandwidth. $39.95 SSB FLTER - Here's a new and different kind of single sideband filter. $27.95 CMOS KEYER - State of the art design uses Curtis 8043 Keyer on a chlp. 80 Hz bandwidth and steep sided skirts separate even the weakest s~gnal from the QRM.
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f you're not completely satisfied, you may return it within 30 days for a full prompt refund (less shipping). Calif Butler, Missouri Pr~ces subml to change w~thout nollceģ ' YOUR COMPLETE SATSFACTON is our goal! And here is the offer that proves it! Order any MFJ Product and try it. Completely self-contained in one small desk mount cabinet with internal solid state power supply, built-in blower and RF relative power indicator. Using a pair of Eimac 8874 tubes it provides 2000 watts PEP input on SSB and 1000 watts input on CW and FM. 5?',? m The Tempo 6N2 meets the demand for a high power six meter and two meter power amplifier. At $ it is undoubtedly the best value available today.
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One channel suppl~ed plus two channels of your choice FREE new as tomorrow! The superb CL-220 bodies the same general specifications as CL-146A, but operates in the frequency ange of MHz (any two MHz without retuning). t S compact, ruggedly built and completely solid state. $ So much for so little! 2 watt VHFlFM hand held 6 Channel capability, solid state, 12 VDC MHz (any two MHz), includes 2 pair of crystals, built-in charging terminals for nicad cells, S-meter, battery level meter, telescoping whip antenna, internal.'-t*q-o Fflq*/T.a VHFlFM mobile transceiver for the 2 meter amateur band. Plugs directly into the VHFlOne with no modification. $ TEMPO SSBONE SSB adapter for the Tempo VHFOne Selectable upper or lower sideband. Super selectivity with a crystal filter at the first F and E type ceramic filter at the second F. Microphone, power cord and mounting bracket included. Automatic repeater split -selectable up or down for normal or reverse operation. 5 KHz frequency selection for FM operation. Compact and lightweight - 9.5" long x 7" wide x 225" htgh.
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Full phase lock synthes~zed (PLL) so no channel aystals are required. Full 2-meter band coverage (144 to 148 MHzfor transmit and receive. The strange thing is that nothing like that emerged in the background.2 " 9 n.2,%> "" - &=3 ( 6.(-,* h P 1 the "ONE" you 've been waiting for No need to wait any longer -this is it! Whether you are already on 2-meter and want someting better or you're just thinking of getting into it, the VHFONE is the way to go. So it could be a calibration issue peaking around 90-100 keV and getting smaller going “north”. Lead 214 peak at 242 keV is almost exactly where it’s supposed to be. I have to say this slight calibration issue at low energies reflects also in the first Uranium 235 peak, which is here at 150 keV instead of 143 keV, and in the Uranium 235 + Radium 226 peak which is supposed to be at 186 keV, but it’s around 190 keV here. In the end I couldn’t find a credible candidate for such a prominent peak from an Uranium ore, but I am open minded about it in case anyone has any suggestion about it. I even considered the possibility that that peak wasn’t Th234, because in my experience it’s not usually as strong as the 77 keV, while here it’s strong enough to overwhelm it, besides, I couldn’t identify the other Th234 peak at 63 keV. The X-rays peak from Lead 214 is not far from where it should be and figuring only as a bump is a bit tricky to “locate” exactly, but the expected Th234 peak at 92.58 keV appears to be at 101 keV which is nearly a 10% discrepancy. I didn’t expect surprises from the sample, but the result wasn’t exactly as I anticipated, the low energy part of the spectrum in particular is slightly “higher” than it should be. 06-Background Recalibrated - 24 Hours - Counts x Bin - NO Shield - 0.042 Gauss - 07_08-02-21.png (55.79 KiB) Viewed 1210 times