On 22 August 2016 at 02:51, bownes <bow...@gmail.com> wrote: > > Comment inline > > > > On Aug 21, 2016, at 18:59, Dr. David Kirkby (Kirkby Microwave Ltd) < > drkir...@kirkbymicrowave.co.uk> wrote: > > > > I am not convinced that this is time-nuts related, although I am sure > many > > time-nuts either have a VNA or would like one. Such a project needs its > own > > forum. > > > > v...@yahoogroups.com would be the place. >
I doubt it would be, although one should ask Tom Baier. I don't suppose he would mind some discussion, but the topic of VNA design is so large and complex that it could generate a huge volume of messages, which are way outside the scope of the VNWA group. I do know of another possible reason he might be a bit reluctant too. I made a post on there once about the fact I had measured the N connector on a brand new competitive product (RigExpert AA-600) and found it was out of spec - photos at http://www.dhars.org.uk/RigExpert-AA-600/ That resulted in the manufacturer of the RigExpert contacting Tom, as they were unhappy about my comments. (Strangely they never contacted me!) I received a phone call from Jan, the UK distributor about it. Basically they did not want to get into a war with other companies like RigExpert. I can see that discussions about VNAs in general could lead to discussions comparing products. In some ways it would be good if there was a forum for VNAs, and similar instruments, which is not tied to any particular manufacturer. I'm not aware of any. There's the HP/Yahoo list, VNWA and there's the Keysight forums. Those are all specific to one manufacturer. There are a number of techniques for measuring impedance, and the VNA is just one of them. Keysight have no forums for LCR meters or impedance analyzers, despite they sell the things. > > The intersection of HP equipment && Time-Nuts && VNWA mailing lists is >> > 1 :) > > Yes, very true. I'm certainly one of them, but as you say, it would be >> 1. Dr. David Kirkby Ph.D CEng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK. Registered in England and Wales, company number 08914892. http://www.kirkbymicrowave.co.uk/ Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.