[Boatanchors] SX25 Hallicrafters

[David Knepper]

I have an SX-25 without the matching speaker.  I use a step-down transformer 
from 600 ohms to 4 ohms to drive a conventional speaker.

I would love to have the matching speaker.

David Knepper - W3CRA/W3ST
Collins Radio Association
www.collinsra.com
Join the CRA today
-----Original Message----- 
From: David Knepper
Sent: Friday, March 07, 2014 4:20 PM
To: wq9e at btsnetworks.net ; rbethman at comcast.net ; 
boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] SX25 Hallicrafters

The SX-25 needs a matching transformer for its 500 or 5000 ohm impedance
audio output.

David Knepper - W3CRA/W3ST
Collins Radio Association
www.collinsra.com
Join the CRA today
-----Original Message----- 
From: WQ9E at btsnetworks.net
Sent: Friday, March 07, 2014 3:56 PM
To: rbethman at comcast.net ; boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] SX25 Hallicrafters

Hi Bob,

I think the best motto when comparing a Hallicrafters receiver to its
schematic is, "expect the unexpected"  :)  Even within a series there are
often discrepancies.  I can say that my SX-88 seems to perfectly match the
schematic in the original manual that came with it but it still provided a
little Hallicrafters amusement.  Because the SX-88 was their high dollar
model every connection had a little red dot of inspection paint put on after
soldering.  One of the coil lugs for the highest range had the nice red
inspection dot but no actual solder :)

I didn't see your reply to the list prior to replying to Rob's email.

Rodger WQ9E

-------- Original Message --------
> From: rbethman <rbethman at comcast.net>
> Sent: Friday, March 07, 2014 2:47 PM
> To: boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] SX25 Hallicrafters
>
> List,
>
> I looked at ONE schematic for the SX-25.
>
> I didn't search my archives for "sub" Model schematics.
>
> The long history of the Hallicrafters substantial "sub" models is an
> ever present reminder to - First provide the initial confirmation of the
> first schematic.
>
> Later models, if the information *is* available may "then" be looked for
> *if* we are made aware of perhaps the simple ink stamp on the chassis
> that would indicate the "sub" model.
>
> Sincerely, Regards,
> Robert "Bob" Bethman
> N0DGN
>
> On 3/7/2014 3:26 PM, WQ9E at btsnetworks.net wrote:
> > As Rob indicated, my SX-25 uses a pair of 6F6 tubes, the similar but 
> > simpler SX-24 has a single 6F6.  Maybe they changed later production to 
> > the 6V6.
> >
> > Rodger WQ9E
>
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