[ARC5] "New" headphone cord set.

[Richard Knoppow]

----- Original Message ----- 
From: "DSP3" <jeepp at comcast.net>
To: <arc5 at mailman.qth.net>
Sent: Friday, January 16, 2015 4:45 AM
Subject: Re: [ARC5] "New" headphone cord set.


> Ken,
>
     The ends of tinsel wire can be soldered by first 
stripping back the outer covering and then wrapping the end 
with very fine wire. Individual strands of zip cord work 
fine here. Solder the wrapped wire and then use that to 
insert into the lugs. Lugs must be cleaned out. The lugs 
used on the HB-7 were intended to make contact by means of 
small teeth that penetrate the insulation. They were wrere 
wrapped around the end of the wire and compressed.  I have 
tried straightening them but have never been sucessful plus 
the teeth generally get flattened.
     There is a second type of lug without the teeth, these 
are just soldered to the wrapped ends of the wire. Same for 
most headphone pins. If you don't have the lugs you can 
often make do by wrapping more wire around the first and 
building it up into a lug with solder.
     I also have encountered at least two sizes of lugs on 
HB-7 headbands. In addition various headphones that were on 
these bands may have different sized screws and holes for 
the lugs.
     I also have not had any luck in wire on the headbands 
but its usually OK except for the tips.  I think these were 
considered expendible items.
     There is another type of headband sometimes found. 
These consist of a fixed frame with a snap-on canvas cover 
with a leather pad on the head side. The forks are of the 
larger size. The designation on the only one I have here is 
so worn I can barely make it out, looks like CBRR and a 
number. I have been able to replace the wires on these with 
a home made harness. Not authentic but makes the headband 
usable. These came with the same "bail out" short cord and 
plug as on the HB-7.
    The ANBH-1 was available as a set with cord for use on 
flying helmets. They were very cheap surplus at one time. I 
still have one. The cord set will not fit onto anything but 
the flying helmet.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com