Gerrie PA3EXV , усовершенствовал МШУ PA3BIY ,который они разрабатывали вместе, и прислал письмо
Last week we were succesfull in getting the noise-system to work. We
measured the first 3 Preamps for 144MHz now and all are below 0.4dB Noise
and around 23dB Gain. One sample is even NF = 0.23dB.
What would you like to have as input-connector, N-type male so you can
connect to coaxrelays direct? Output type is normally N-female, but can be
what you want.
Hope to hear your wishes and we can calculate price.
Costs is around Euro 100,- all complete build and tested, incl measuring
report in solid aluminium case like shown on my website: www.pa3exv.nl (look
under 144MHz PA3BIY Preamp).
Again, we prefer to ship completed units because the design is critical and
we can measure and fine-tune so it does not oscillate at very high
frequencies around 7GHz.
Did I understand your friends also are interested?
Gerrie, PA3EXV
Holland