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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- 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
- 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 ...
- 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.
- 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.
- 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
- 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 ...
- 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.