JUMA Amateur Radio Forum

Hello Kevin and Ron, Nice to hear that you are interested in Juma PA1000. I appreciate all your comments. Ron, I understand your comment on the separate RF section. The reason to the design is that I am seeking simplicity and reproducibility because I like it and I don't like the popular hassle cons...

Daniel, 1. Noise Blanker option has not been launched. The intented location in the main board is (was) the pin header between Polyphase and 1st filter. We made few Noise Blanker prototypes but we did not get good enough results. The technical reason is that the bandwidth is too narrow to detect fas...

Frank, Thank you for a good advice. I purchased shielded Teflon wire from the johnswireshop.com Here is one link http://stores.ebay.com/Johns-Silver-Teflon-Wire-Shop/Shielded-Wire-Coax-/_i.html?_fsub=3966787&_sid=155009&_trksid=p4634.c0.m322 The wires look good and he price is preferable. I ...

Do not waste your money on 25 ohm coax. #24 single shielded Teflon wire is very close to 26 ohms. Frank, tnx for the good advice. What do you say about this Teflon cable? http://www.ebay.com/itm/25-24-AWG-Shielded-Silver-Teflon-Wire-Coax-/230603278042 BTW, have you measured other gauges of shielded...

Hello Bob, Thanks for very informative reply. Nice to hear that you are also experimenting the Freescale MOSFET. Actually I don't know anybody else who is doing something in HF with the MOSFET. Sorry to hear about your weak results. I think that the harmonics are related to incorrectly operating RF ...

Exactly, Adrian has done outstanding modifications and related documents. I have also put Ardian's Juma modification documents into the Juma site - link "User HW and SW modifications" http://www.nikkemedia.fi/juma-trx2/rev-b/index.html http://www.nikkemedia.fi/juma-pa100/pa100.html 73 Matt...

Hello Tilman,

You have made a great additional Juma documents in your site.
Ps. I removed the qutation marks from your Juma site address. This way forum will create a direct link http://juma.thulesius.se

73 Matti OH7SV