Thanks Robin (wipes perspiration from brow …)

Hi Robin If there are still any extra components spare please could I have a board? Dave G8KHU

I you can't come up with a more elegant solution an "ugly" brute-force approach might be to add an external solenoid / motor-cam / etc arrangement pushing on the armature such that when de-energised i

In general the lead-free solders have a melting point around 220 C whereas lead based solders are around 180 C - check the actual data sheet to be sure. The higher the silver content in lead-free the

Two I know of: Gigatronix with an "x" - cables etc based in Havant UK - is the one you're looking for Gigatronics with "c" manufacture test equipment ... and of course there may well be others Dave G8

Try reinforcing the the exterior of the bobbin with some Kapton tape? With luck it would make it strong enough to unwind/rewind and be thin enough you wouldnt have to remove it to re-assemble the rela

Hi Roger There are several threads with useful information on the HP group, search "meter scales" https://groups.io/g/HP-Agilent-Keysight-equipment 73 Dave

It was. It's demise was sudden, smelly and noisy after powering up after a couple of years of not having power applied. I'm led to understand that the failure mode is due to the casing / potting resin

I tried harder ...

"Flexible Twistable" WG would be worth considering. I have a short length of Gabriel Waveflex WG16 which is twistable and flexible in both E and H planes - specced as 30 degrees / foot repetative. I s

Thanks for the heads up Paul, I look forward to further details when available and I have no issues whatsoever with doing a lateral flow test beforehand 73 Dave

Mouser and Digikey both stock a decent range - OK so not UK per se, but at least VAT and duty sorted out by them so pretty hassle free. Shipping cahrges for orders sub £30'ish are a bit higher than Fa

Chris If they are still available I'd like them please. 73 Dave G8KHU

I should also have added - if you don't already know - that on the 8753 you can change the source power. In the STIMULUS key group go to MENU and then the POWER softkey. you can either enter a power d

Hi Conrad The VNA is essentially a sweeping source and a tuned receiver that tracks the frequency of the source. With a long cable by the time that that the stimulus from the source has traversed the

Oops sorry, the first link is wrong, should be https://www.spaceanswers.com/solar-system/astronomers-watch-the-sun-through-a-microwave-lens/ Dave

When it gets very narrow you get pictures like this - it doesn't say at what frequency other than "microwaves" https://www.spaceanswers.com/space-exploration/celebrating-15-years-of-the-spitzer-space-

<< ...in the sun's near field. >> Not sure I completely agree with that Andy. If the sun is a single source driving a sun diameter antenna, then yes indeed. If you consider the sun to be an enormous a

Mike The set of 4 dual port parts with the two holes at the back could well be single balanced mixers - missing the diode holders and probes though. See https://www.tpub.com/neets/book18/80h.htm Dave

Ben As an addendum to Mark's analysis we were looking at Skyworks parts for a commercial application requiring +32 dBm CW continuous. We looked at the SKY66293 and SKY66318 which have very similar spe