My Dad, Steve Hunt (G3TXQ), passed away peacefully at home on 29th December 2018 aged 71 years, after a 3 year battle with prostate cancer. He enjoyed Christmas with his family and friends around him
Have a close look around the emitter of Q7 -it should be soldered directly to ground so should never rise above 0v in Tx or Rx. Steve G3TXQ On 03/09/2018 13:05, ROLAND HOWELL via TenTec wrote: Hi Ste
Folks, I need to replace the rotary encoder in my OmniVI. Can anyone tell me the easiest way to get at it and do the replacement. It's easy to spot the encoder when you take the bottom cover off, but
Bob, Thanks - the new part should be with me by the weekend, so I'll give it a go then. Steve G3TXQ 73 Bob, K4TAX On 8/8/2018 4:14 AM, Steve Hunt wrote: Folks, I need to replace the rotary encoder in
Using a 9 MHz IF conveniently gives you 80m and 20m coverage from a 5MHz VFO without the need for heterodyne crystals; however it does _not_ produce a sideband inversion. What happens is that the tun
I should have added for completeness that it's a 5MHz IF with a 9MHz VFO mixing arrangement that produces a sideband inversion between 80m and 20m. It also does away with the tuning inversion. Steve
I don't see any error in the schematic. The output from the FET oscillator stage is taken from the crystal bank common line via L3 into balanced mixer U1, Pin 11. Steve G3TXQ One other error in the s
The manual quotes 0.3uV for 10dB S/S+N typical - that would be-117dBm into a 50 Ohm load. Is it the same on all bands? Steve G3TXQ On 30/08/2018 20:41, ROLAND HOWELL via TenTec wrote: Hi AllI have an
How sensitive is it if you inject a signal directly after the BPF at connector 32 on the RF mixer board? That would eliminate a lot of the front-end diode switching. PS - not sure why R25would burn o
As others have said, the internal balun is a 4:1 voltage design - a better option is a 1:1 current balun. I use my TT238 tuner with an external 1:1 current balun comprising 11 turns on two stacked FT
My illness and resulting paraplegia mean I need to begin clearing some of my treasured Ten-Tec collection seen here: http://www.karinya.net/g3txq/shack/op.jpg So, I will be selling the CorsairII - bo
Do any of the ideas here help: http://www.karinya.net/g3txq/corsair_pto/ Steve G3TXQ On 26/10/2017 01:47, Curt Benjamin via TenTec wrote: Guys, since the N4YG DDS is no longer available and too expen
Curt, Can you not simply connect the RIT line to one of the Arduino analogue inputs and use that to generate a proportional frequency offset? That's what I did in my PIC controller. Steve G3TXQ On 26
Curt, The Arduino analogue inputs provide 1024 level discrimination. Translated to +/- 1000Hz that equates to 2Hz steps. I don't know why that would be considered not smooth enough? I sent you the so
The DDS is actually cleaner than the PTO for "close-in" noise. If I inject an S9+60dB signal into my CorsairII and position it just outside the receiver pass-band, then swap between the DDS in the ex
Curt, That function will return a value in variable RIT between -1000 and +1000, proportional to the analogue RIT voltage. You then simply add that to your required output frequency before executing
Curt, I built a general purpose signal generator using an Arduino to control an AD9851 module. I used AD7C's code with a few modifications: http://www.ad7c.com/projects/ad9850-dds-vfo/ It would be ve
I wonder if anyone has a Scout/Argo band module they would be prepared to sell - even a damaged one! I use the band modules in a home-brew QRP transceiver which I an trying to put on 60m. I have the
I've been asked by someone to provide details of the earlier Mk1 version of this transceiver. I've just uploaded some information to my web site: http://www.karinya.net/g3txq/cubii/cub1/index.php Sti
Ron, That's difficult to answer without knowing the level of expertise someone has. I reckon the design is pretty robust and reproducible, so it's mostly down to the level of mechanical skill. I used