Homebrew 6 meter amplifier

  • 6 & 2 meter LDMOS 1KW Linear Amplifiers (click on any photo for a larger view) My interest in 2 meter EME made it obvious to me that I needed a bit more power than the usual 100 watts available from most radios on the market. For years, I had used a Henry Radio Tempo 2002 tube amplifier that uses a pair of no-longer-available 8874 triodes.
IF amp 10.6 to 10.8 with AGC IF Xtal Filter 10.7 for SSB Double Balanced Diode Mixer Modules BFO 10.7015 USB and 10.6985 LSB DDS Direct Digital Synt AD9850 with PLL PIC16 controlls the DDS and the LCD Display readout Rotary gray code encoder Audio Amps, Mic amp AGC Automatic Gain Controll Diode Switch AGC Tester

10 watt HF 17 meterband amplifier using 2SC1969 or 2SC1944 or 2SC1173 1 watt 10-meterband AM/CW transmitter 0.5 watt 20-meterband AM/CW transmitter RF Powermeter / dummy load Viportmutant: Portable (balcony) multi band HF-antenna MAR-6 based preamp updated

Jan 18, 2009 · Picture #6: Another look at the innards. Picture #7: I did not even attempt to build the high voltage power supply inside the amplifier case. The power. supply, shown here, is in a wooden box with wheels. It just rolls around to whatever spare space it can find. The. transformer, at the bottom left, is the potted version from the BC-375.
  • The Grid meter is marked out as 0-80mA as normal and anything above 80mA as abnormal. The control board will trip the amplifier at 90mA. Meter design software can be found here: Tonne Software The basic software is free and easy to use, but the full version allows you to use colour on the display. I've used the full version for the scales on my ...
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  • Other tubes will work up to 10 meters, and it would be easy to add the other bands. "The Novice 1/4 Gallon" amplifier, built from old TV set parts and using a pair of TV sweep tubes. This is a Class B linear amp. Drive required is 25 watts, and power input is 250 watts.

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    10 watt HF 17 meterband amplifier using 2SC1969 or 2SC1944 or 2SC1173 1 watt 10-meterband AM/CW transmitter 0.5 watt 20-meterband AM/CW transmitter RF Powermeter / dummy load Viportmutant: Portable (balcony) multi band HF-antenna MAR-6 based preamp updated

    Posted on May 14, 2020 May 14, 2020 by Rob Powell Posted in Transmitters Tagged Ham radio, home brew, irf510 amp, linear amplifier, push pull amplifier, si5351a, vk4hat 6 Comments More Receiver Work So with the VFO and Audio board working i turn my attention back to working on the receiver.

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    The amplifier performs well, also at the low frequencies, on 100 kHz it is two S units stronger than my old BC design. Above 3 MHz to 15 MHz, the gain increases even more and should actually be lowered slightly according to the S meter. In contrast, all stations are bomb hard. The S/N ratio seems goed, it works better than with the INA amplifier.

    CLOSE UP VIEW OF HFO AMPLIFIER CHAIN The HFO output power measures +17 dBm + or - 0.4 dBm for all bands 160 to 6 meters. CLOSE UP VIEW OF TRANMITTER BOX CLOSE UP VIEW OF HFO TR SWITCH CIRCUIT CLOSE UP VIEW OF INSIDE OF THE HBR-2018 BEFORE THE XMTR BOX WAS INSTALLED Quick Links 1. Receiver Measurements 2. Design Process 3. IF-Detector Module 4 ...

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    Mar 03, 2008 · Homebrew Regenerative and Crystal Radios. 2-Step Audio Amplifier It makes sense to have a good, versatile utility audio amplifier to try with some of these projects rather than incorporating integral audio stages on every one.

    Nov 10, 2013 · One thing i noticed too, the input WSWR also improved from good to exellent. It was abt. 1:1,6 before and now the reverse power is hardly seen on swr meter. in 5W drive and 70+ watts output, the gain was reduced some db fractions. Maximum gain with these was well over 12 db before the resistors, but unusable due the oscillations.

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    N4IP HF and 6 Meters amplifier - A solid state amplifier for HF and 6 meters band by N4IP... 144 MHz PA with MRF317 - A 2 meter power amplifier... 144 MHz 1.2 Kilowatt Amplifier - 144 MHz Kilowatt Amplifier with a Gu74b....

    Chapter 6 BUILDING A HOMEBREW QRP Among the guys I work, QRPs seem to be the most common homebrew project, second only to building antennas. Therefore this chapter describes a simple QRP design I have settled on. I use my QRPs as stand-alone transmitters or I use them to drive a final amplifier to produce higher power, 25 to 100 watts.

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    RF - Homebrewing a 6 Meter Yagi By Zack Lau, W1VT Six meters is a great band for home built Yagis. The elements are reasonably small, but not so small that building tolerances are critical. With careful construction and detailed instructions, it is certainly feasible to build no-tune Yagis up to 432 MHz, but I have my doubts about 903 Yagis

    Two on 10 -- Ten meter portable beam from Al Alvareztorres, Jr. AA1DO Antenna Projects-- 10m Antennas -- From Brian (G3SYC) and Ian (M0BCG) 10M 3 Elements By DF9CY 10M Yagis a Bunch-- From The Antenna Elmer: 6 Meter Antennas: Six Meter Antennas A Bunch-- From 6MT.com Six Meter Monster Beam-- 8 element, 41 foot boom, 14.0 dBi gain, By N6CA

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    Nov 18, 2020 · The next one on the list is a cage dipole. For this, you will need either 4 or 6 inch (10.2 or 15.2 cm), thick wall PVC sewer, or water pipe, and a way to cut it in either 1 ⁄ 4 or 1 ⁄ 2 inch (0.6 or 1.3 cm) spreaders. Use of a compound mitre saw makes this job easy. Use a 12" saw to cut the 6 and 4 inch pipes.

    SB-200 Six Meter Conversion and Retrofit - N4LR and W4ZT 6/2007 in progress Heathkit SB-230 Please note: Although we show you how the GI-7B can be used to retrofit the SB-230 in the original conduction cooled configuration, we feel it is only fair to tell you that the tube will not cool as well as a conduction cooled amp as it will with the ...

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    The lefthand meter is 1 amp for anode current, and the right-hand meter is 100 m/a for grid/cathode current. The top box contains the 8877, Anode choke, and Pi-L tank circuit. Note the strap between the RF choke, the anode head and the 1000pf 20kv isolating capacitor, this is made from 1/2" wide brass stock, it also forms the anode connection.

    Jun 11, 2020 · One such rig is the WRL Duobander. This was a $160 radio (1960's) that worked 80 and 40 Meter SSB over two ranges: 3.8 to 4 MHz and 7.1 to 7.3 MHz. It had two 6HF5's for the finals and had a 300 Watt input. Contained in the rig was some very clever circuitry with a 5.55 MHz four pole crystal Filter and a VFO that tuned in the 1.6 MHz range.

The oldest piece of gear in daily use was built while I was still in high-school in 1951: a small 6 meter amp, now used as a driver. My first 3 years of clumsy bread-boarding are sadly lost and not available for on-the-air use; this loss no doubt benefits nearby TV watchers. It is typical for old-timers that old homebrew gear was not saved.
Adventures in measuring the selectivity of MCU-controlled super-regenerative quartz crystal controlled receivers. Resulting in a very useful selective log power meter. Parent article: MCU Controlled Super-regeneration with Quartz Oscillators. 6 comments.
Actually that dipole is 98.6 feet long and by using an antenna tuner am able to run that dipole on bands like 75M, 60M and 40M. The magic number of 98.6 has to do with an extended dipole length actually 3 half wavelengths on 20 Meters where it was initially used --yes it is a gain antenna on 20M. That was used before I had the beam.
7: Overview of RF input circuit with dual 180 uHy, 76 amp filament chokes and .015 coupling capacitors. 8: Shown is the relay that grounds the tube cathodes and the 12 VDC power supply. 9: Homebrew cathode ammeter shunt (red coil) and front panel test switch. 10: Size of chassis: 22" x 17" x 6".