Joe McElvenney wrote:

Hi,

You are correct Bob, according to the SCR-221 technical manual
(TM-11-300) there should be two Bristol wrenches (#6 & #8) in the
spares kit. I have just tried the one I have on an old wreck of a
BC221-T and it fits but don't know whether it is a #6 or a #8. It
is just under a 1/10" across the flutes.

I believe that during WWII there was a specially employed
lady, complete with tattoos presumably, whose task it was to
tighten the set-screws on all military equipment. She did such a
good job that nobody except a certain candidate for the
governorship of California has since been able to move them.


Cheers - Joe


I put a drop of "Breakfree" in the hole and wait a couple days to
remove tight screws.
--


Michael A. Terrell
Central Florida

Roy Lewallen wrote in message ...
....
I don't have a Bristol wrench for comparison any more, but I recall
their cross sectional shape as resembling modern Torx drivers.
....
:-) Yep, indeed. In fact, my older daughter bought a new faceplate
for my younger daughter's cell phone as a present, only it turned out
to be a whole new case (clear plastic). Yours Truly got to replace
the case, which was held in with #6 Torx. I was happy to find that
one of the Bristol spline wrenches from an old GC set fit just fine,
as my Torx drivers go down only to #8 here at home. So you MAY find
that a #6 or #8 or #10 Torx will work in your BC221. Mebbe I'll go
try it on my LM (Navy equivalent of the BC221) and report back.

Cheers,
Tom

Roy Lewallen wrote in message ...
....
I don't have a Bristol wrench for comparison any more, but I recall
their cross sectional shape as resembling modern Torx drivers.
....
:-) Yep, indeed. In fact, my older daughter bought a new faceplate
for my younger daughter's cell phone as a present, only it turned out
to be a whole new case (clear plastic). Yours Truly got to replace
the case, which was held in with #6 Torx. I was happy to find that
one of the Bristol spline wrenches from an old GC set fit just fine,
as my Torx drivers go down only to #8 here at home. So you MAY find
that a #6 or #8 or #10 Torx will work in your BC221. Mebbe I'll go
try it on my LM (Navy equivalent of the BC221) and report back.

Cheers,
Tom

"Bibby" wrote in message
news:z3c0b.183660$YN5.135802@sccrnsc01...
Dick, as others have said, these probably need Bristol wrenches. I
bought
some a few months back from

Good luck,

Malcolm, W1/GW3NJY




Some Bristol wrenches here
http://cgi.ebay.com/ws/eBayISAPI.dll...ategory=46 73

"Bibby" wrote in message
news:z3c0b.183660$YN5.135802@sccrnsc01...
Dick, as others have said, these probably need Bristol wrenches. I
bought
some a few months back from

Good luck,

Malcolm, W1/GW3NJY




Some Bristol wrenches here
http://cgi.ebay.com/ws/eBayISAPI.dll...ategory=46 73

Bill Janssen wrote: I vote for the Bristol answer. I think I have a couple here
but it would

probably take a "crime scene" investigation to find them. I have a couple of
BC221
and the newer version with a CRT.

Bill K7NOM

That CRT comment was about as wrong as can be.
The "CRT" was a magnifier glass to read the film strip dial.

Should have looked at the unit before commenting.

Bill K7NOM

Bill Janssen wrote: I vote for the Bristol answer. I think I have a couple here
but it would

probably take a "crime scene" investigation to find them. I have a couple of
BC221
and the newer version with a CRT.

Bill K7NOM

That CRT comment was about as wrong as can be.
The "CRT" was a magnifier glass to read the film strip dial.

Should have looked at the unit before commenting.

Bill K7NOM

I believe that during WWII there was a specially employed
lady, complete with tattoos presumably, whose task it was to
tighten the set-screws on all military equipment. She did such a
good job that nobody except a certain candidate for the
governorship of California has since been able to move them.

Many, MANY years ago I wanted to remove the knobs from several pieces of
equipment (BC-610 tuning units vaguely comes to mind), and I recall that
I stripped an average of one properly-sized Allen wrench per knob removed.
Fortunately, the town where I was living at the time (Fort Collins, CO)
had a "war surplus" store, and -- even more fortunate for me -- they had
bins AND BINS of Allen wrenches of the proper size for a dime apiece!
Needless to say, I bought a lot of them!

--Myron.
--
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTX). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)

I believe that during WWII there was a specially employed
lady, complete with tattoos presumably, whose task it was to
tighten the set-screws on all military equipment. She did such a
good job that nobody except a certain candidate for the
governorship of California has since been able to move them.

Many, MANY years ago I wanted to remove the knobs from several pieces of
equipment (BC-610 tuning units vaguely comes to mind), and I recall that
I stripped an average of one properly-sized Allen wrench per knob removed.
Fortunately, the town where I was living at the time (Fort Collins, CO)
had a "war surplus" store, and -- even more fortunate for me -- they had
bins AND BINS of Allen wrenches of the proper size for a dime apiece!
Needless to say, I bought a lot of them!

--Myron.
--
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTX). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)

"Dick" wrote in message
...
I'm trying to get a hold of a tool that will undo grub screws
securing the front panel knobs on my venerable BC221, can anyone suggest
where I can get a hold of one, a modern equivalent and/or something that
can be modified to do the job ??
Although all BC221s were provided with the tool (stored in a
clip beside the spare valves) I've never seen one and can only guess
that it must be something like a very small Phillips screwdriver head
but with a parallel rather than tapered tip. It must also be less than
3/32" dia 'cos I've just tried to make one by hand out of 3/32" dia
steel rod and that was too big, don't think my eyesight is up to hand
filing the cruciform tip in any smaller dia rod, hence a request for
help !!
My BC221 is still furkling along after 63+ years (& only c/s -
There, I've said it !!) out of calibration) but I think I should at
least try & smarten up the case with a good clean and a bit of fresh
paint. Who knows, it's probably got more chance of making the century
than I have.
Thanks
--
Dick
GM0MNL


You need Bristol wrenches or Bristol keys or whatever Bristol calls them.
They come in 4 or 6 point form. The 6 point ones look very much like Torx
head screws. You need the 4 point type. I got mine from McMaster Carr:

mcmaster.com

I don't know if Bristol wrenches are easily available in the UK. McMaster's
website seems to be down right now, but I have to figure they do
international orders.

Frank Dresser