[ARC5] Transistorized ARC-5 Receiver

[Phillip Carpenter]

Charlie, W8CFO wins the cigar for locating the article and citation: "Solid State Q5er" in Ham Radio magazine August 1969, pp. 20-25!

This is probably the article that Ian Johnson originally stated he thought was published in Short Wave magazine.

Any way, I am now able to read and study the article.

Many Thanks to Charlie and the Forum!

I'm particularly interested in a possible solid state substitute for the noisy 12K8 mixer tube. In the above referenced article the Mixer portion was replaced by a 2N1639 and the Oscillator portion was replaced by a 2N384. By comparison the Mixer tube  (6SA7) in the BC-348 that Wayne referenced earlier today was replaced with two 2N1466As. A 6BE6 Mixer has been previously replaced with the LM-1496.

I'm in contact with Edward Allison who sells the 1L6 solid state replacements on eBay that Ken Gordon has purchased tried with good success. Edward believes he can use the same dual gate MOSFET he uses in the solid state 1L6 to make a solid state 12K8 replacement.

I'll keep the Forum posted on any success with this development.

Respectfully,

Phillip W4RTX 

Sent from my iPhone

On Jan 1, 2017, at 8:55 PM, Arden Allen <gumbear at pacbell.net> wrote:

>> Gotta take care of the series filament issue though.
> 
> Putting a 2 watt heater replacement resistor running at full dissipation (.15A x 12.6V = 1.89W) inside of a silicon 12SK7 is not a smart idea.  Wire the resistor to the tube socket terminals - well away from the FET(s).
> 
> Arden Allen
> KB6NAX
> 
> He who is cruel to animals becomes
> hard also in his dealings with men.
> We can judge the heart of a man by
> his treatment of animals.
> —Immanuel Kant
> 
> 
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