Posts

My Antennas

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3rd Apr 2017, first HF 40m band antenna, wire with Hygain balun. 5th Aug 2017, tower from a friend. 3rd Sep 2017, prepare to make foundation. 5th Sep 2017, progress on foundation. 5th Sep 2017, progress on foundation. 8th Sep 2017, progress on foundation. 8th Sep 2017, progress on foundation. 25th Nov 2017, 2 sections erected. 18th Mar 2018, 3 sections erected.  18th Mar 2018, 3 sections erected. Other antennas are still not seen on this photo, will upload them later.
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HAM Room

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 19th Sep 2015, my first ham setup since moved to this house, my old tube AM 80m transmitter with tube Siemen all band receiver, waiting for a register into ham radio as new comer. 22nd Jan 2017, after receive first General license 3 days before old AM80m transmitter removed and changed to 2m transceiver. 03rd Apr 2017, new homebrew BITx SSB 40m first time used. 29th Jun 2017, an Icom 718 replaced homebrew BITx SSB 40m. 23rd Sep 2017, callsign added. 24th Feb 2018, create new ham room. In progres.. 25th Feb 2018, progress new ham room.. 27th Feb 2018, progress new ham room.. 01st Mar 2018, progress new ham room.. 02nd Mar 2018, progress new ham room.. 24th Jan 2019. 27th Jan 2019. 29th Jan 2019. 15th Feb 2019. 22nd Oct 2019.
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HF Amplifier LDMOS BLF578

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. First time build in 25th Aug 2018. Progress the cage in 25th Aug 2018. Progress in 27th Nov 2018.    Complete the cage on external front and rear panel. Progress in 30th Nov 2018. Finish on internal cage. Amp meter added.  Progress in 2nd Dec 2018. Work on PCB of TX and RX switch . Etching PCB. Etching done completely. PCB for voltage in with 2 relays.   Progress in 3rd Nov 2019.   Work continued on internal parts. .....and internal wiring. Progress in 4th Nov 2019, testing. The critical thing is the trimpot bias should be adjusted to get an IDQ  at 1.7 to 2.0 amps for BLF 578. Other LDMOS such as BLF188XR 1 amp is suggested according to data sheet. First time launching use in Oceania SSB DX Contest 6th Oct 2019, High Power All Band Single Operator 500W based on license permitted as an Advanced.   During the test, input by RTTY with
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