A reminder that the 2022 GM Microwave Round Table will be held on Saturday 22 October in the Museum of Communication in Burntisland, Fife. Full details are at https://www.gmroundtable.org.uk/ . I am i

It has not been operational for a while. I believe there are difficulties accessing the site. 73s Brian GM8BJF

HI mark, I am interested. Will (obviously!) be at GMRT. 73s Brian GM8BJF.

Hi Lee, Yes. My transverter still uses them. I keep thinking I should build something newer but that would probably not achieve much. I have replaced the PA module with a Qualcomm amp (which is of sim

Hi Peter I have found a useful and cheap/simple way to generate a weak signal for the microwave bands is to drive a suitable diode in a WG mount with the output from a TCXO. Suitable diodes are the ol

Hi Colin, You seem to have got the data you need. I ran mine off 12V and was not aware of issues. It ran that way Up a 30 ft tower north of Inverness at GM3WOJ's QTH.for a couple of years. Mine came o

Hi Colin, I have a Dasco DQ7013 10MHz OCXO. I got it from David GM6BIG. I have no data on it but I ran it for a couple years in the GM3WOJ 10 GHz 10 Ghz beacon. It was stable and held the frequency wi

This was on the SBMS reflector and migh be of interest to people here. 73s Brian GM8BJF ____________________________________________________ From: Al Katz <alkatz@...> Date: Wed, Jan 6, 2021 at 8

You may be aware of this already but there is a schematic diagram of the "black" ADF4351 boards. I found it on a Chinese and downloaded it. I have it and the one for the ADF5355 PCB on my website at:

I have used these Chinese SMPS boards widely in different projects. All of the buck types supposedly based on the LM 2596 IC that I have come across used what I took to be a re-marked (not fake) LM257

Adrian, Did you find an RDDS. I have a complete one ex GB3EDN! 73s Brian GM8BJF

Hi Andy, Here is a plot I did some time back. I thought I had it somewhere! They were not very well mounted when testing and the stopband rejection might actually be better. 73s Brian, GM8BJF

Hi Andy, I have used one as a signal generatyor covering 54 MHz to 13.6Ghz which I have foung useful in the shack.While it does not have the PN performance of a professional surplus unit I can at leas

Hi Rich, The best ones I have found are the the AD ADM7150 series. there is a 3.3V variant. I used them in with the AD5355 PLL chips. They are a bit pricier that the usual 3 terminal varieties! AD are

Hi Roger, I have ordered a populated PCB from Tim on the FundRazr page. I have added a comment asking it to be included in the UK order delivered to you. I doubt I will be at Martlesham, but I will pa

The 2019 Scottish Microwave Round Table will be held on Saturday 2 November. It will be in the usual venue, The Museum of Communications in Burntisland. Bookings are now open at https://www.gmroundtab

Hi Barry, I just double checked out both the Rotary.h library and RotaryEncoder.h library. Both compile and work OK on my setup at least. I confusingly left the reference to the Encoder.h libray on th

Hi Dave Yes the references are not terribly accurate. Even if they are reasoonably stable there is no way of setting them on exactly on frequency If you want accuracy you will need to arranage an exte

Hi Dave, That is a new board to me as it has the microcotroller chip on it along with an OLED display. Some of the earlier more basic boards used pretty ordinary voltage regulators and were quite Phas

This is to advise you that GB3EDN on 1296MHz has been spotted on 2019-04-20 It was spotted on 1296.9900MHz at 18:17 UTC by SM6VTZ locator JO58UJ27 distance 940km. Comment:- jo58uj<tr>io85jv 579 n 0. T