Adventures of a broadband amplifier. Updated product 1 to 930 MHz amplifier 2w Or this low-cost version These products often change, you can view a similar one here Some radios are equipped with a 0dBm (1mW) output that can be used to drive an amplifier. The advantage of this output is it usually works over […]
Working Hellschreiber from a cold war bunker
Today I was able to operate the special event call sign GB0SNB from the Kelvedon Hatch Secret Nuclear Bunker. Hellschreiber was my mode of choice, its fun and easy to identify on the air and also quite rare. Operating was completed from the original home office radio room deep inside the bunker. Here you can see […]
472 kHz reception on WSPR
Having played around with the Wellbrook loop on 7 MHz the other evening I decided to try some 472 kHz reception on WSPR. I had never tried 472 kHz before, as the combination of local noise and poor antenna has always put me off. The Elad FDM-DUO seems quite sensitive down to 100 kHz (the […]
Comparing the Wellbrook Loop to a Doublet Antenna
This evening I decided to complete a test using two different HF setups in an effort to compare the receiver performance of my antennas. Radio 1, Kenwood TS 990, doublet antenna 10m per leg @ 9m Radio 2, Elad SDR, Wellbrook RX loop @ 3m I decide the best way to test on receive would […]
FSQ on 5 MHz
FSQ is a Fast Simple Qso chat mode, a bit like chatting by SMS or Skype but of course using RF. The FSQCALL protocol was developed by Murray ZL1BPU with significant input from Con ZL2AFP. Murray suggests all the hard work was done by Con 
FSQ is intended for fixed frequency (channelized) operation, with […]
RSGB Christmas cumulative contest
Today I operated alfresco with George M1GEO from our contest site at Kelvedon Hatch SNB. Operating as M0TAZ/P from Kelvedon Hatch SNB in JO01 we managed to operate 3 bands, 144, 70 and 50 MHz. The contest was a RSGB Christmas Cumulative Contest and we entered as the Secret Nuclear Bunker contest group. Portable Equipment 144 […]