[ARC5] More Solid State Tube Conversions

[Hubert Miller]

2N4416 is nothing special, so the price should never be higher than this.
The article: I looked up the author's QTH and wrote him a paper letter.
No reply ! Another person who holds to the creed, "Hams are helpful" !

I am thinking I prefer dualgate MOSFETS or FETs in cascode stack, as used
in the HA-600 and DX-150/ 160 receivers of recent past. This requires a
separate transistor for AVC amp, which does make it not a simple plug-in,
altho you can still do it without any major hack to the receiver. I have saved
up a bunch of receiver manuals and my plan, which is on a sidetrack for now,
was to scan in the relevant schematic sections for a kind of cookbook.
There is a guy on Youtube showing his ss conversions of popular receivers
like Hammarlunds and so on. I bought a couple of his 'conversion manuals'.
My conclusion is, there are some good ideas but overall the conversions, altho
they seem to work well, are not very sophisticated, if you'll permit that term,
or maybe I should say not as elegantly simple as I prefer, and the added
power supply feels like too much a hack. I also don't care for the idea of
adding in a new audio layout; I prefer to still use the output transformer,
but I haven't quite figured out how to do that. And I would leave the original
power transformer, if any, still in.  -Hue Miller

>there is a guy on Ebay selling a lot of 4 2n4416 for $10

On Friday, January 22, 2021, 12:17:33 PM EST, MICHAEL ST ANGELO <mstangelo at comcast.net<mailto:mstangelo at comcast.net>> wrote:


This article uses bipolar transistors. Unfortunately it is easier to find tubes that bipolar transistors these days. I would use field effect transistors.

This site had conversions using 2N4416 FET's but the site is no longer active.
Does anyone know where to find this conversion article?

<https://bc348.wildlandradios.com/Modules.htm>

The 2N4416 is still available but pricy. There are cheaper plastic equivalents.

Mike N2MS


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