[Milsurplus] [vmars] Re: [ham-hist] Fox-hole radios

[J. Forster]

I've never built one using other than a commercial diode.

However, some years ago there was a thread on another Group about the
properties of a Razor Blade detector. Has anybody built one and put it on
a curve tracer to see how good (or bad) a diode it really is?

IMO, a comparison between a Razor Blade and a Galena "Cat's Whister" (ie
point contact diode) detector would be very interesting indeed.

Best,

-John

=============



> Is anybody interested in vmars?
> from
> w4jbm at bellsouth.net
>
> On 07/07/2010 13:47, Jim wrote:
>>
>>
>> I've been working on an article for a "back to basics" magazine. Many of
>> their
>> articles have to do with things like gardening, hunting, and fishing.
>> But
>> there was an interest in an article on the fox-hole radios soldiers used
>> in
>> WW2.
>>
>> The article is pretty much finished but I really would like to include a
>> couple of photographs. I had planned to build my own but haven't had the
>> time. I was curious if anyone had built one (or a similar type of
>> crystal set
>> using something like the "blued" razor blades as a detector) and would
>> be
>> willing to share pictures. Or, plan b, does anyone know of any photos of
>> these types of receivers that could be printed without copyright issues?
>>
>> I certainly would give credit to anyone who provides the photo and make
>> sure
>> the get a copy of the issue it is printed it. (Assuming it makes the
>> editorial cut...)
>>
>> 73 de
>> Jim W4JBM
>>
>> http://www.hamuniverse.com/w4jbm/