[Hallicrafters] S38 Front end

[Charlie]

So put a #47 pilot light in to make up the difference.

73' Charlie k3ICH


----- Original Message ----- 
From: "Edward B Richards" <zuu6k at juno.com>
To: <deliberatus at verizon.net>
Cc: <future212 at comcast.net>; <Hallicrafters at mailman.qth.net>
Sent: Tuesday, April 04, 2006 2:42 PM
Subject: Re: [Hallicrafters] S38 Front end


> Actually, it is a 35Z5. That plus the 50L6  add up to 75 volts. The 70L7
> would make the filament string draw a little more current. 
> 
> 73, Ed Richards K6UUZ
> Simi Valley, Ca 93065
> Home of the Air Force 1 pavilion
> 
> On Tue, 04 Apr 2006 12:42:24 -0400 Kirk Z Bailey
> <deliberatus at verizon.net> writes:
>> VERY good one, all things considered. Still, I am amazed that they 
>> did 
>> not save a little more by using a 70L7GT and using only 4 tubes- 
>> which 
>> would have been a very noteworthy saving on overall costs.
>> 
>> If I find a rough but workable S38A, I will do the minimum to get it 
>> 
>> working and safe, then remove the 30Z5 and 50L6 and replace them 
>> with a 
>> 70L7, and see how it sings for me. IF and WHEN I do this, I will 
>> notify 
>> the list.
>> 
>> DW Holtman wrote:
>> > Some of the toughest problems an engineer can face is trying to 
>> design a 
>> > radio that can be built for a few bucks. Finding ways to save 
>> pennies on 
>> > every one built can be a huge challenge. Designing for the 
>> military is a 
>> > whole different ball game, where cost is not something to be 
>> overly 
>> > concerned with. With lots of funding, construction on a nicely 
>> machined 
>> > aluminum chassis with shielded compartments certainly make things 
>> easier 
>> > even with the far superior specs required.
>> > 
>> Yes, double shielding and proper attention to precision of 
>> mechanical 
>> linkages and structure contribute to the quality. One of my likes 
>> about 
>> the S38 and the A is they are mechanically stable and certain in 
>> their 
>> action, where as my Mark 2 E is sloppy with play apparently from 
>> structural members flexing under the tension of action.
>> > The people at Hallicrafters who had to build a radio like the S-38 
>> for 
>> > around $15.00 to sell it for around $30.00 I think did a damn good 
>> job.
>> > 
>> > 73's
>> > DW Holtman
>> > WB7SSN
>> > 
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>> > 
>> 
>> -- 
>> end
>>                            ---oo) :-) (oo---
>> Blessed Be!
>>         - Kirk Bailey
>> 
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>> 
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>> 
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