[ARC5] Transistorized ARC-5 Receiver

[Brian]

Hello folks,
I wonder if we've gotten ourselves trapped into thinking we need to 
replicate all functions of a tube. If you really want that kind of 
authenticity, how are you going to build in the noise?
If I were to transistorise a Command set, I would replace ALL tubes, and I 
would NOT put in resistors to simulate the heaters. That would reduce power 
dissipation / consumption by about 12 W - one of the advantages of going SS.
Perhaps, Phillip, when chatting with your friend, Edward Allison, you could 
ask him to make SS replicas without a heater resistor. Then it doesn't 
matter whether you're relacing a tube with a 6 V, 12 V or 28 V heater.
For my 2 c worth, to replace all 6 tubes at US$45 a pop, is worth more than 
the whole receiver. My suggestion would be for some of us to experiment with 
SS replacements and then share their results here. Who has a stock of 
MPF-102s?
73 de Brian, VK2GCE.

On Monday, January 02, 2017 8:16 AM , you said to Jim Haynes:

Jim,

I'll ask him if he were to develop a SS tube replacement if he puts a 
resistor in there for the filament.

My guess is that the plug in SS tube replacement simulates the tube 
functions nearly exactly.

Phillip W4RTX