A Homebrew AUX-7 Board for the Drake TR7 and R7, by Floyd Sense / K8AC. Homebrewing The Drake 1544 RV75/R7 Adapter, by Lee Craner / WB6SSW. The Drake TR-7 Transceiver Renewed, by Marc Van Stralen / PA1HFO. Vintage Radio Refurbishing Before Restoration, by Ron Baker / WB4HFN. TR-7 Modification For Wide Band AM Transmitting, by Jeff Covelli / WA8SAJ .

The Lakeside 40 is a permeability (variable inductance) tuned direct conversion DSB (Double Side Band) transceiver for 40 meters. It's based on many homebrew designs I've seen on the web; however, the biggest influence and inspiration comes from Peter Parker's Beach 40 DSB Transceiver. Oct 23, 2015 · The Ten-Tec Century 21 is an interesting transceiver. In the simplest sense it was an ideal radio for the Novice Licensed HAM operator of the 1970s. It is a CW only transmitter. It doesn't require fiddling with a resonant tank circuit of the typical tube radios of the era to work out resonance.

Jim, WA6OTP, has recently released a new PTO VFO kit. Very reasonably priced. I highly recommend any of his kits. Also, check out his other kits and crystal radio book. A magnetic loop for SWL Reception, A great easy-to-build loop for 2 to 20 MHz SWL reception. A good antenna for the SWL build of the Electroluminescent Receiver Kit.

The TR7 is similar to but in most respects less sophisticated than the IC-720. It lacks a CPU and CAT control and is not fully synthesized, employing an open-loop, mechanically tuned VFO (PTO). The frequency display is actually a frequency counter, and setting the operating frequency can be awkward, particularly in split mode. Adapting the IQPro VFO to the Drake TR7. Written By: Floyd Sense - K8AC Angier, North Carolina . Link To More VFO Pictures: The following documents what I've learned in adapting the IQPro DDS VFO for use as an external VFO for the Drake TR7 transceiver.

A Homebrew AUX-7 Board for the Drake TR7 and R7, by Floyd Sense / K8AC. Homebrewing The Drake 1544 RV75/R7 Adapter, by Lee Craner / WB6SSW. The Drake TR-7 Transceiver Renewed, by Marc Van Stralen / PA1HFO. Vintage Radio Refurbishing Before Restoration, by Ron Baker / WB4HFN. TR-7 Modification For Wide Band AM Transmitting, by Jeff Covelli / WA8SAJ

Oct 10, 2019 · PS the PTO/VFO was not homebrewed by me. It's a kit from W6AOTP. I am very pleased with it. I used a lightweight aluminum project box, and lately it has been drifting a lot. Insulation, shortening component leads, and warm-up time helped. I also added a tiny 1 watt bulb inside the enclosure to help stabilize temperature. #009 The Radio Shop/Ham Shack Tour. 42,442 views 4 years ago. This is a tour of my shop, equipment, and ham shack. You will not find new modern day equipment here. Most of my gear is old and ...

The PTO VFO is in the middle and upper middle of the main board. The buffer the upper right corner. The mixer is quite conspicuous in the lower middle of the main board. The RF front end amp is the small board off by itself near the volume control pot, the audio amp is the long strip board at the bottom with all the large orange electros on it.

Oct 23, 2015 · The Ten-Tec Century 21 is an interesting transceiver. In the simplest sense it was an ideal radio for the Novice Licensed HAM operator of the 1970s. It is a CW only transmitter. It doesn't require fiddling with a resonant tank circuit of the typical tube radios of the era to work out resonance.

Sep 12, 2009 · I have half a dozen of them in dedicated propagation study receivers, and one SSB exciter I occasionally use on UHF. The other day I was changing something else in one of my receivers and connected the solid-state PTO to the frequency counter on my bench. The PTO was set to 3.100000 MHz.

Oct 27, 2019 · This marks my 500th post in the blog. Not bad, considering most of the posts are projects, that is a lot of soldering. Carrying on, I had been experimenting with GPS disciplined oscillators, most using a control loop for a 10Mhz crystal oscillator using 10Khz output from a GPS module PPS.

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HF TRX with PTO based VFO. While surfing around the 'net I came across WA6OTP's website. Now I've seen PTO based VFOs before, but his implementation is very simple and elegant. I just couldn't resist the urge to build one myself and try it out. Amateur Radio (G3TXQ) - Ten-Tec Corsair II PTO. I love my old ten-tec Corsair II - its performance compares favourably with more modern radios, it's easy to service, and it has “real knobs” for nearly every function; but, arguably, one feature which lets it down is its Permeability Tuned Oscillator (PTO) VFO.

It is priced inexpensively and goes together quickly. My latest home-brew project (a 30 meter CW XCVR) uses his latest kit, you can see a photo of this admittedly unusual looking modular radio on my QRZ page. The vfo is easy to program with buttons on the vfo or with a computer and makes operating home-brew rigs a pleasure.

The TR7 is similar to but in most respects less sophisticated than the IC-720. It lacks a CPU and CAT control and is not fully synthesized, employing an open-loop, mechanically tuned VFO (PTO). The frequency display is actually a frequency counter, and setting the operating frequency can be awkward, particularly in split mode.

It is priced inexpensively and goes together quickly. My latest home-brew project (a 30 meter CW XCVR) uses his latest kit, you can see a photo of this admittedly unusual looking modular radio on my QRZ page. The vfo is easy to program with buttons on the vfo or with a computer and makes operating home-brew rigs a pleasure. .

Since the PTO is out of the radio, the spread is most simply calculated with a frequency counter and counting the turns. 180 kHz would be a major problem, I don't see how it could get that bad. The description in the manual as far as reinstalling the PTO is a good way to tear it to pieces if you are not very careful.