[Hallicrafters] Dial String "twang" on an SX-130

[Julian Bunn]

Here's a fix for the twanging dial string problem I asked about the 
other day. I got this
tip from an antique radio forum, and it worked really well for my SX-130.

1) Carefully remove the dial string
2) Clean all pulleys and spindles so there is no oil or dirt on them
3) Take one of those old wax paper capacitors and, holding one end
of the cord against the wax, pull the cord through, against the
capacitor, so applying a thin coat of the wax to the string.
4) Re-string (the tricky bit)

Voila: no more twanging :-)

Julian


Bill Gerhold wrote:

>It could indicate an alignment problem with the sheaves.
>
>K2WH
>
>-----Original Message-----
>From: hallicrafters-bounces at mailman.qth.net
>[mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of Julian Bunn
>Sent: Monday, October 17, 2005 2:14 AM
>To: Hallicrafters List
>Subject: [Hallicrafters] Dial String "twang" on an SX-130
>
>I am refurbishing an SX-130, and trying to understand why both the 
>bandspread and main tuning cords "twang" at various points while tuning. 
>I have a similar problem on an S-107. I think I can see what is 
>happening: for example, on the bandspread knob's spindle there are about 
>three loops of the dial cord, which sit in a rounded groove in the 
>spindle. As the spindle turns, these loops move backwards and forwards 
>slightly, according to the direction of the turn. As they do so, they 
>tend to move up the sides of the rounded groove, and at some point slip 
>back, so causing a scrunchy twanging noise (Perhaps I shopuld provide a 
>link to an MP3?!) - the dial cord vibrates.
>
>Is this a common problem? How can it be fixed - does it indicate that 
>restringing is required?
>
>Many thanks!
>Julian
>
>  
>