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Hi,previous call VK4XRA,enjoy restoring collins equipment from 1930,s to 1980,s.Operate Collins KW-1 & 75A-2A on all bands AM as well as cross mode with SSB stations .S-line gear on 40 & 20 metres as well as a 62S-1 on 6M & 2M SSB 144.1 driven by Rockwell Collins 32S-3A and RE 75S-3C.Collins TRC-75 overhauled by Gary VK2BLC ( he took all of the fun first Hi HI !)Collins 618T-3,KWT-6 and other collins amateur rigs.

Rockwell Collins HF-80 system ( circa late 1970s ) now operating on all bands AM (AME / vestigal ) & SSB (4 channel I.S.B simultaneous ) ,8054A RX, 851S-1 RX, 8020 P.A. ,8030 power supply. 8060 pre/post selector filter,8014A exciter 1.6 mhz to 30 mhz in 10 hertz steps.  8070 receiver /exciter (transceiver) RX 500 KHZ to 30 MHZ ,TX 100 MW nominal 1.6  to 30 MHZ

 

A collins 30K-5  (circa 1950's ) is now on air thanks to help from many good people. Operating mostly on 7.125 Am as well as 29.0 AM and 20 metres.

Now back to restoring Collins 30FXB circa 1934  (early relay rack frame model ) All metal work stripped back and repainted with either wrinkle black or copper paint undercoat with aluminium conductive top coat.

Found most of required valves but would like to fit the original "balloon " types if around types 45 46 & 47 .

Any collins 1934  30FXB manuals,circuits ,photographs, copy or loan, would be most helpfull to ensure a historically accurate restoration.

ZL2BYW (Ron) was kind enough to put his 30K-5 on air last week, we enjoyed a three way collins net on 7.125 with the two collins 30K-5s and VK4AAT's Collins ART-13 all using the Astatic D104 crystal mike on G stands.

 

Looking for parts for late model Collins 30J transmitter circa 1939/1940. Art '& RCA kissed and made up by then, so using RCA valves as opposed to the "C" series valves made by amperex?

 In the late 1930s Hallicrafters introduced the HT-4 high power ham transmitter using the McCullough (later Eimac ) 250 TH tube in the PA class C driven by 807 and modulated by a pair of100 TH in class B driven by a pair of 2A3.

like most commercial stations and studios of the 1930s the speech amplifier was outboard and provided about 2 watts of audio at 600 ohms around the whole studio and  you could switch the audio to any desired transmitter's modulator.

the HT-4's speech amp known as the HT-5 or the BC614.

Hallicrafters also built the SX28 receiver with a selection of speakers available,in the very early 1940s Hallicrafters asked Jensen to modify their Orthomorphic? base reflex console speaker using a 10" speaker to suit the SX28.

the result was the R-12 base reflex console with 12" Jensen speaker with 5000 ohm input styled to match the classic art deco of the receiver..

This BC-610 E saw military service during WW2 prior to the Wireless Institute of Australia, pressing the transmitter into service delivering the Sunday news on 40 meters during the 1960s from East Melbourne.

the WIA went sideband in the '60s  so the BC610 was sold to Allan Bolton in 1966 .

the transmitter was stored carefully in country Victoria for more than 20 years until Ian VK3MO,Neil VK3MH and Allan ex VK3AGB kindly passed the BC610 on to be restored and now running on 7.125 from Brisbane.

 

 

 

 

So much fun playing radio at your own pace without the commercial & professional constraints of airline flying, (my previous career).

7323560 Last modified: 2016-05-18 20:54:00, 3655 bytes

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