Ah that's a pity, i remember ringing the shop from somewhere in the middle of GI from a telephone box and ordered some really nice Rifa 350V 100uf caps for a 4cx250 amplifier, Always meant to go to Li

Here is a picture of the 8V regulators The 1A one is on the right and the one on the left is really a 0.5A regulator with the wrong markings cheers Geoff GI0GDP

Hi Gareth, One of the best things i ever bought was a SMA 8-12 GHz directional coupler and an HP crystal detector and actually measure the forward and reflected voltage and derived the SWR into the lo

I used 26mm tall end stops and got acceptable results Geoff GI0GDP

There are some dimensions here and the losses are no where near 12dB ! https://www.microwavers.org/scatterpoint/2017/Scatterpoint_1702.pdf cheers Geoff GI0GDP

I plan to be on say between 11 and 2pm on 10GHz from IO74BR Knockagh Monument Tele 07817 177907 cheers Geoff GI0GDP

Yeah guilty here of not bothering with 100nf at the in and out but not this time. Its unfortunately a sad reminder of issues with parts from Epay as Andy said. Oh it doesn't get warm it was on the sam

Don't know from who on Epay i got these from but they look the job and give 8 volts and crater at 600mA, not a problem in most cases but when it feeds a -ve voltage generator like the ICL766x then the

Depending on the weather i should be out with the new 10 GHz system from IO74BR40LR cheers Geoff GI0GDP

Hi Colin If you have or can get RadCom August 2007 page 46, i just measured the SWR of 2 of them last night and only had to file the SMA pin down a little from the dimensions given to get 1.44:1 (whic

Yes the LT1054 is a much better spec indeed and i use them also, the point of the original post was that sometimes you just "assume" things run from 13.8V without issue until you read the tight spec t

Aye and that's another point its probably to your advantage to feed them from a higher voltage say 8 to 10V when using them as -ve generators and put the 79L05 or what after the ICL7660 as i think we

The ubiquitous negative voltage generator and also voltage doubler which is handy for powering op-amps has a very tight supply spec as i have found out, The recommended operating voltage is 12V and th

Seems strange to short the input to output in any circumstances but whilst in Rx the power to the PA is off so it will be of no concern. Geoff GI0GDP

Here is a picture As i said i have been using this stuff for at least 10 years and kills tin box resonances at 10 GHz cheers Geoff GI0GDP

Yes and i use them all the time, source here is Lakeland cheers geoff GI0GDP

A simple way to reduce the inductance is to use 2 in parallel to get the correct value and also use them with the value marking facing the pcb No harm in over thinking cheers Geoff GI0GDP

Not as bad as 240 VAC into a home brew 13.8v transceiver! cheers Geoff GI0GDP

Hi Dave, Yeah i sent the picture "small" to save space but you cant read the label that i deliberately included doh! Anyway they work for me on 5.8GHz ATV and 6cm SSB (1.6 watts) cheers Geoff Gi0GDP

This is the device i was talking about, no receive path in this one cheers Geoff GI0GDP