JUMA Amateur Radio Forum

Hello Andrei, I have a bitter experience with the use of the Chinese 2SC2879,HuaGao Semiconductor, (from the same manufacturer you are talking about), with which I bought my JUMA 100 (maybe the last issue). They lasted several months. JUMA 100D, I use as a driver of ACOM 1000, with no more than 55 ...

Highly recommend not using the Chinese 2SC2879,white in color . I bought maybe the last set Juma-100d, October 2018. The Chinese 2SC2879, which were in the set, lasted exactly 3 months. I had to buy from e-bay final amplifier, from an old Kenwood TS-450, which work great, but are Toshiba. Merry ...

Hi Matty No, I do not have a problem with the JUMA 100D at the moment, via RF SENSE MODE. Maybe for more than two month,s i work with the nice train-express, SUNSDR-2 Pro=> JUMA 100D(55-65W)=> ACOM 1000 in the contest's. In the beginning I had a problem with rf sense mode, switching from 3.5 to 7 ...

Matti!
HNY 2019, please tell me it's ok for JUMA 100D????
Thank you in advance!!!! I have JUMA 100D with sunsdr 2 pro.
73 de Slav - LZ1ZJ

Petr,

I bought maybe the last kit JUMA 100D amplifier at the end of October. It might take some technological time to prepare the new kits.
73 de Slav - LZ1ZJ

A friend of mine finished the build of my JUMA 100D amplifier witch I bought at the end of October 2018. It all works very well. The only problem I have is that when I want to switch from 3.5 to 7Mhz or 7Mhz to 14 Mhz, via the RF SENSE mode, the amplifier enters standby mode and the display shows ...