Search found 2 matches

by jsm
Thu Apr 27, 2017 4:31 pm
Forum: Everything Else: Antennas, Relays, Switches, Power, Grounding, Cooling, etc.
Topic: Hermes F3, wrong part...
Replies: 7
Views: 7039

Re: Hermes F3, wrong part...

The problem is that there is no 2A hold part with the same itrip value (probably not possible). The 2A hold part has a 4A trip. So that part may run cooler and work great, but it also may not be providing the needed protection. In the HPSDR email list Phil Harman mentioned that he replaced F3 with a...
by jsm
Fri Apr 21, 2017 5:53 am
Forum: Amplifiers & Tuners
Topic: Elecraft KPA1500
Replies: 5
Views: 7124

Elecraft KPA1500

Elecraft just announced a new solid state full power amp. It is 50V LDMOS based. The interesting thing for HPSDR based radio's is that even though the Elecraft transceivers don't have a need for a sampler output, they put one in "for sampling use by transceivers that support it". Since it ...

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