[Hallicrafters] SX-101 Mark 3

[k6uuz at juno.com]

To reduce the line voltage to a safe level see BAMA, about 1/2 way down
the home page for a voltage reducer.

Ed Richards

On Sun, 02 Feb 2003 22:29:04 -0600 MIKE SOUHRADA <wb9iog at revealed.net>
writes:
> Brad Hyde
> > I have been trouble shooting an SX-101 Mark 3.
> Don't have data on the M3 so looking at 101 Mk 1A
> schematics and data. You might be spinning your wheels with
> an erroneous assumption.
> So here's my thoughts.
> 
> The BFO is not working.
> That tube 6SC7 as I recall can be nasty to work with. Did you test 
> it
> first?
> >I started checking voltages on the tubes and found that they were 
> much higher.
> How much in %? What are the BFO readings.
> Know what you mean having trouble with a GPR 90 now. The 101 voltage 
> 
> spec is 117 so it shouldn't be too far off. I'm currently running 
> 118-122 VAC here and had lots of trouble with a KWM 2 but those are 
> rated for `110 VAC.
> When I tracked the actual voltage back it calculated exactly to the 
> difference in line voltage standard change.
> 
> 
> I remembered having this trouble with a Collins receiver one time 
> and the
> problem was with the filter choke. FOR THE COLLINS
> 
> Sure enough the resistance on the choke was 16 ohms instead of the 
> 310 
> ohms expected.
> FYI The choke specified in mine is 9Hy 135 Ma 250 ohms DC. It seems 
> to 
> me that ripple would be very bad but still not cause the BFO to NOT 
> WORK? So I'd look for something else first; then solve the ripple 
> problem.
> Make sense?
> 
> Does anyone know where I can either get this choke rewound,  or get 
> a 
> new or used one?
> I need a 8 Henry choke rated at 85 milliamps with a winding 
> resistance 
> of about 310 ohms.
> You might consider a rewind. Shouldn't be that hard but bet someone 
> has 
> one near your
> need. What are the bolt hole dimensions?
> Mike Iowa
> 
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