11-15-2021, 07:45 PM
The power supply was a father/son project. The receiver came from one of my dad's buddies that he knew thru the fire department. Dad was a volunteer and his friend a photographer for the local newspaper. He was a ham also. One day Dad needed to pickup some pictures from him so I went along for the ride. When we got there he was on his 75mtrs hb rack mount tx and Collins 75A* rx. He invited to the mic I said a few words to the fella up in NY (I was living in MD back then). The P/S was mounted down in the bottom of the 6'rack. It used a pair 866A that flickered when I spoke into mic.
By the end of the visit I was given the BC-454/ with the tuning knob and a Surplus Conversion manual which has all the info to get it to work.
When we got the parts together we started in on the p/s. Aluminum chassis, 2 long blue selenium rectifiers, an used power transformer, a couple of 6v filament transformers (needs 24v for the heaters. 24v transformer weren't all that common back then) and a 40mfd 450v capacitor.
Wired up the 5v & 6v to get 11.3 then the other two 6v transformers which make 23.9v for the heaters. The hv ended up at abt 200v using the 40mfd brute force filter. It still had some hum so later on I fitted a choke and a 2nd cap. It got rid of the hum.
Next was the control panel. BFO switch, 1/4' headjack and rf/IF gain control all onto a rather small piece of aluminum. Then I was ready to go...
Later on I also retuned in to cover 3.5-7.5mc so I could get both 80 and the 40mtr ham bands. Over the years I've had all of the lw/hf receivers and most of the hf tx's.
de N3GTE
By the end of the visit I was given the BC-454/ with the tuning knob and a Surplus Conversion manual which has all the info to get it to work.
When we got the parts together we started in on the p/s. Aluminum chassis, 2 long blue selenium rectifiers, an used power transformer, a couple of 6v filament transformers (needs 24v for the heaters. 24v transformer weren't all that common back then) and a 40mfd 450v capacitor.
Wired up the 5v & 6v to get 11.3 then the other two 6v transformers which make 23.9v for the heaters. The hv ended up at abt 200v using the 40mfd brute force filter. It still had some hum so later on I fitted a choke and a 2nd cap. It got rid of the hum.
Next was the control panel. BFO switch, 1/4' headjack and rf/IF gain control all onto a rather small piece of aluminum. Then I was ready to go...
Later on I also retuned in to cover 3.5-7.5mc so I could get both 80 and the 40mtr ham bands. Over the years I've had all of the lw/hf receivers and most of the hf tx's.
de N3GTE
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
