[Hallicrafters] Hallicrafters HT-33A

[Carl]

The 2000W PEP SSB was officially approved by the FCC in writing to 
manufacturers. Im not sure exactly when but when the NCL-2000 came out 
in 63 it was advertised that way. A FCC clarification letter on how it 
was measured, meter sensitivity/damping, etc., was posted on the 
bulletin board.

Carl
KM1H

----- Original Message ----- 
From: "Glen Zook" <gzook at yahoo.com>
To: <hallicrafters at mailman.qth.net>; "Carl" <km1h at jeremy.mv.com>
Sent: Friday, September 19, 2008 8:07 PM
Subject: Re: [Hallicrafters] Hallicrafters HT-33A


> The high voltage would be a "killer" using 8122 or 8072 tubes.  I have 
> a line on an 8295A tube and hope that it is still available.  That way 
> no changes will have to be made.  I still am going to change out the 
> 3B28 tubes for solid-state.  I have appropriate diodes in stock so 
> that will not involve any expense.
>
> Of course the 2000 watt PEP "rule" was "unofficial".  Everyone just 
> "assumed" that a peak of 2000 watts on SSB represented the official 
> 1000 watt limit.  The FCC didn't really care so everyone went with 
> that figure for SSB.
>
> By the way, does anyone have a photo of the bottom plate on the HT-33A 
> or HT-33B?  Mine is missing that plate.  It won't be any problem to 
> fabricate a new one but seeing what the original looks like would be a 
> help.
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
>
> --- On Fri, 9/19/08, Carl <km1h at jeremy.mv.com> wrote:
>
> From: Carl <km1h at jeremy.mv.com>
>
> Here is a 4CX1000A conversion, the 4CX1500B is almost identical. A 
> stock 33B is shown for comparison.
>
> http://www.hollowstate.ca/HT33B.html
>
> http://www.isquare.com/personal_pages/ht33b.htm
>
> The FCC 2000W PEP SSB rule was in effect when the B model was out and 
> Id suspect that it was capable of meeting or exceeding that. 
> Unfortunately I do not have a manual or an ad handy to confirm.
>
> I had considered the current AC line voltage when I commented about 
> the 8122's.
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