[Boatanchors] [HallicraftersRadios] Hickok 600A

[RODNEY HOGG]

I have a couple NOS 83 tubes if needed.

Rod
K0EQH


----- Original Message -----
From: "Gary Hitchner" <talgarth at comcast.net>
To: "Bill Mellema" <n3wm at yahoo.com>, "Walt Cates" <cateswa at msn.com>
Cc: "Boatanchors" <boatanchors at mailman.qth.net>
Sent: Tuesday, November 14, 2023 10:06:09 AM
Subject: Re: [Boatanchors] [HallicraftersRadios]  Hickok 600A

Have to 2nd that, I use a 752 and 752A here, haven't  replaced a 83 for a
long time.................
Gary
WA2OMY

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
<boatanchors-bounces at mailman.qth.net> On Behalf Of Bill Mellema via
Boatanchors
Sent: Tuesday, November 14, 2023 10:52 AM
To: hallicraftersradios at groups.io; Walt Cates <cateswa at msn.com>
Cc: BOATANCHOR QTH <boatanchors at mailman.qth.net>
Subject: Re: [Boatanchors] [HallicraftersRadios] Hickok 600A

 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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