[Boatanchors] [HallicraftersRadios] Hickok 600A

[Bill Mellema]

 Walt,
I have owned a bunch of Hickok tube testers and have found the best solution is to just replace the 83 and be done with it IMO. This how the way Hickok designed them so modifying that circuit adds doubt to the overall accuracy, again, just my 2 cents worth. 83 tubes are relatively inexpensive and last for years.
Good luck with your unit..
73's
Bill N3WM


    On Tuesday, November 14, 2023 at 09:24:10 AM EST, Walt Cates <cateswa at msn.com> wrote:  
 
 Yes, The web is full of solid-state workarounds for the 83 rectifiers. I have done it, it works. My raw B+ and bias voltages are dead on. I have the operations/calibration manual. That was not my question. The secondary AC voltages are reasonable, reflecting today's higher line voltages. I am just curious about internal voltage readings with different switch settings. I can calculate these things, but in my lazy old age I was hoping some one had done that work for me.


Walt Cates, WD0GOF
https://wd0gof.com/Hallicrafters

A majority of acceptance is not proof of correctness.


https://wd0gof.com/bible-study/commentaries/

________________________________
From: HallicraftersRadios at groups.io <HallicraftersRadios at groups.io> on behalf of Richard Knoppow <1oldlens1 at ix.netcom.com>
Sent: Monday, November 13, 2023 11:26 PM
To: HallicraftersRadios at groups.io <HallicraftersRadios at groups.io>
Subject: Re: [HallicraftersRadios] [Boatanchors] Hickok 600A

FWIW, the 83 is a full wave mercury vapor rectifier. They have a
typical voltage drop of 15V regardless of current. Filament is 5V @
3Amps. Since silicon rectifiers are cheap one can simply series several
to obtain the right voltage drop.
There are probably data sheets on the web, I looked in a very old
RCA handbook to find it.

On 11/13/2023 9:00 PM, waltcates wrote:
I have the manual with the schematic. But, there are no voltage notes or
charts in the manual.
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
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