I run an SDR-1000 into a pair of SGC-500's driving a pair of dipoles with the phasing done on the input of the amps. This turns out to be a killer set up. I'm pretty fond of the SGC-500's. I'm not sure what I'd recommend for power supplies, though. I'm using three, yes three, of their PS-50's in parallel to drive two amps. I'm not in love with that arrangement. I would recommend that you buy the optional fan unit or better yet, build one.
Don't bother with band switch cabling. It is totally unnecessary. PTT is optional too. I ran for a long time just letting it sense the RF and turn itself on. I switched to providing PTT from the Flex. I like that better. I don't run CW through this amplifier. I suspect QSK might be an issue. I haven't used it mobile but one of them was being used for mobile. The guy I bought it from really liked it as a mobile amp. Jon, K6JEK On Jun 24, 2007, at 9:15 AM, Jim Lux wrote: > At 08:15 AM 6/24/2007, Richard Stouffer wrote: >> I ordered a Flex 5000 last week and because I'll be waiting a >> while, I've >> been playing around with some ideas regarding amps. I have an >> AL-811, but I >> want something more "transportable" for occasional use in my >> motorhome. I >> spent a limited amount of time looking over available information >> on the >> internet and the reviews, for the most part, seem very favorable, >> except >> grumbles about the pricing and the possible need for two 50 amp power >> supplies running in parallel. From what I understand, I would >> only need two >> if running RTTY. >> >> >> >> I wondered is anyone here has experience with one on an SDR 1000 >> and how it >> might work with the 5000. > > I know a couple people who are happy with the SGC500. It's a > bulletproof brick and is very popular in military/NGO applications > with things like ALE. The only downside is that it IS a 12V > amplifier, and so, is subject to all the limitations of the > relatively low voltage (high current, low efficiency).. > > It is NOT a great deal on watts per dollar, but you knew that > anyway.. you buy this for the ability to not worry about killing it > accidentally. It has all sorts of internal protection (input > overdrive, output mismatch, sudden DC supply voltage decreases, etc.) > but you do pay for it. > > I was ready to buy one for my Passat a couple years ago, then I got a > new car, and I wanted to dial in the HF operation in the new car > before going QRO, and then got busy with other things, so haven't > gotten around to it. > > > As far as interfaces with the SDR1000 go, you'll need to cobble up a > cable for the bandswitching (although, the amp does have automatic > bandswitching, too.. it senses the RF frequency and switches > accordingly, but it takes a tenth of a second or so) > > Jim, W6RMK > > > > _______________________________________________ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Knowledge Base: http://kb.flex-radio.com/ > FlexRadio Homepage: http://www.flex-radio.com/ > _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
