[Milsurplus] Spring/Summer Project

[Andy Young]

No, BA, which is short for 'British Association'. Whitworth threads are big
things, used on steam engines and the like!

Curiously,  BA is actually metric in origin, with 0BA (the largest) having
25.4 threads per inch.

Andy
M0FYA

-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of
W2HX
Sent: 02 May 2017 01:19
To: Ray Fantini <RAFANTINI at salisbury.edu>; Hubert Miller
<Kargo_cult at msn.com>; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Spring/Summer Project

> Another interesting problem is that the radio is not SAE or Metric, so

Witworth?

-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of
Ray Fantini
Sent: Monday, May 01, 2017 8:13 PM
To: Hubert Miller; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Spring/Summer Project

Its a tough little radio, not only used for long range communications but
also did double duty as the ships DF receiver. entirely all aluminum. also
used a "magic eye" tube for "tune to max" being that required less
circuitry. The reduction tuning was a bunch of slip clutches or something
like that with no big machined gears like US sets . Once taken all apart and
cleaned was a surprising good action and works well on the Ham bands.
Somehow thew receiver works great being sensitive, selective  and with a
more usable band spread for the Ham bands then its US counterpart the
BC-348, its also smaller and lighter then a BC-348. 
I would think the biggest challenge for anyone serious about that receiver
is first finding one with all the DF circuit still intact being that's the
first thing everyone allays pulled out and then the crazy Brit capacitor
cans. from what i recall they were a can maybe three inches long and five
eights wide that housed all the bypass capacitors for one or two stages. the
capacitors would all open but if that was not bad enough the can had four
red wires , one for each section and a black wire that were manufactured
from some form of plastic that on the two i have seen deteriorate to the
extend that touching them the insulation falls off.
Another interesting problem is that the radio is not SAE or Metric, so all
the hardware is unique to that radio, so simple things like screws or nuts
are a real issue.
Speculation : this receiver was as common in Europe as the BC-348 was here.
I hate to say it but the BC-348 is build like a battleship in comparison to
the R-1155 but the R-1155 was smaller, must have cost less to build and
included a direction finder, what was the better receiver?

Ray F/KA3EKH
________________________________________
From: Milsurplus <milsurplus-bounces at mailman.qth.net> on behalf of Hubert
Miller <Kargo_cult at msn.com>
Sent: Monday, May 1, 2017 3:12 PM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Spring/Summer Project

I had never seen the inside of an R-1155 before. My, they really conserved
metal, didn't they?
Yes, i do understand British industry was being pummeled at this time, while
U.S. industry was safe behind the oceans, with vast resources at its
disposal.
-Hue
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