[Hallicrafters] S38 Front end

[Edward B Richards]

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
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