[ARC5] Solid State 6AL5

[Peter Gottlieb]

What is the I-V curve like in a 6AL5?  Does it start acting like a diode at lower voltages than a Ge diode like a 1N34A?


Peter

> On Feb 5, 2018, at 1:47 PM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
> 
>> On 5 Feb 2018 at 13:38, Bill Cromwell wrote:
>> 
>> Hi Ken,
>> 
>> Are the 1N34 germanium?
> 
> Yes.
> 
>> If so I wonder how newer silicon devices would 
>> work or even silicon power rectifiers.
> 
> I wonder too, but I did't try those at the time.
> 
>> I am getting more interested in 
>> this and I will try to compare the tube vs solid state agc circuits I 
>> have on hand here. We know that solid state devices can work in agc 
>> circuits because they do in existing radio gear.
> 
> Yes, but SS AGC circuits are, of course, designed differently from tube-types. I would think 
> that some sort of FET would work better than straight diodes, though.
> 
>> To the original question about just plugging SS diodes into those tube 
>> circuits - maybe not. It seems the whole idea is to NOT modify the radio 
>> and keep the option of plugging in the diode vacuum tubes. Mods may be 
>> required.
> 
> Yes.
> 
>> Related to this but with the shoe on the other foot I am interested in 
>> trying double balanced diode rings with 6AL5 and 6H6 tubes. Somebody is 
>> sure to tell me it can't be done. In that case I will find out why :)
> 
> Yes. That HAS been done. I have an article around here somewhere on doing just that. As I 
> remember it, there was some difficulty with balance issues.
> 
> Later,
> 
> Ken W7EKB
> 
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