Fw: [Hallicrafters] Solid state rectifier and matching

[John - AI4FR]

Bob,
    You forgot about the fellow that would tie into his neighbors home a few 
hundred feet away with an extension cord. He effectively lowered the line 
voltage and was also able to run his old boat anchor free of charge.


John / AI4FR



AI4FR's Virtual Museum
http://www.webspawner.com/users/ai4fr/index.html



Date: Sun, 09 Sep 2007 02:12:05 -0400
From: rrkrr <rrkrr at comcast.net>
Subject: Re: Fwd: Fw: [Hallicrafters] Solid State rectifiers vs Vacuum
Tube rectifiers
To: hallicrafters at mailman.qth.net
Message-ID: <46E38EB5.40800 at comcast.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

125VAC is one of the US standard these days.  It was raised from the
various 110/115/117 VAC standards several years ago.

This same solid state rectifier discussion comes up on every boatanchor
related list every few months.
This is a six step process:

1. Someone mentions the idea of replacing their boatanchor's vacuum
rectifier with solid state rectifiers.
2. Someone else mentions that if you replace a conventional vacuum
(non-mercury vapor) rectifier with solid state rectifiers, the resulting
DC output voltage will go up by some amount, depending on the current
draw from the supply and the plate resistance of the original vacuum
rectifier.
3. Any number of methods to correct the the DC output voltage back to
the original are mentioned.
4. Most hams with some technical experience with electronics can figure
out their preferred method, those that have less experience but want to
learn will ask more questions.
5. This oft repeated discussion ensues, with about 50% expanding on #3
and the other 50% opining that #1 should not be attempted under any
circumstances.
6. Pause for a few months, then repeat starting with 1.

Anyone else notice this pattern?

Bob K4ERR