[Milsurplus] Japanese Chair

Tue Feb 14 14:20:37 EST 2017

Along that subject I was thinking about an account of how just after the war when transiting thru Midway there were huge mounds of equipment like GO series transmitters the airborne brother of the TBW along with tons of other parts and radios that were removed from aircraft returning back to the states with the storage space deemed way more valuable than the radios themselves. The radios thrown in ditches and the like to get rid of them.
My question and at this point is my assumption is that the TBW, GO and the TDE are all the same transmitter. The difference being the TDE was designed for installation in ship or shore where weight was not an issue, the TBW was intended to be a field transportable version of the TDE and the GO family of transmitters was an extreme light weight TDE for use in Navy aircraft like the PBY.
The TDE and TBW are very similar in use of dual sections for HF and MF, use of screen modulation and the use of a signal 813 PA tube. The TDE did have an additional power supply that provided bias and back when I was running a TBW did notice that the original keying system used with the TBW when used with the intended 800 cycle supply and reduced filtering would provide fair keying and a lack of chirp when you used an AC supply with filters for 60 cycles the remaining energy in the filters caused a chirp when the transmitter was switched to standby. The thing is that if you add the same bias circuit from the TDE to the TBW design it resolves that issue. The GO family also goes so far as to remove the screen modulator to further reduce weight. Looking at the size, weight and skilled requirements for a radio operator for use with the GO/RU stuff can see where that would be my preference to remove and replace all that stuff with an ART-13/BC-348 as soon as possible. Wonder if any GO/RU configurations lasted beyond the war and if that accounts for the sets dumped in Midway?
Another point that's not related to anything but have noticed that the quality of returned links now on Google has taken a nose dive. There are a couple people who whenever I post something like this want to point out the error of my ways and how I have screwed it up again, so I always try to do a quick Google search to try to find the original links so I can attribute some of the things I say but now when I do a quick Google search on the history of war in the Pacific I get back a group of links that all lead to sanitized web pages that appear to be written for idiots? Has the quality of Googles search engine decreased that much or is it me just not remembering correctly?
Both the account of GI use of a captured transmitter at Guadalcanal and the account of the radios dumped at Midway at the end of the war are from articles that were on the internet that I have read years ago but now have not been able to find the original just a load of carp that looks like it was written for fifth graders.

Ray F/KA3EKH

-----Original Message-----
From: Thekan, Paul [mailto:Paul.Thekan at cpii.com] 
Sent: Tuesday, February 14, 2017 12:47 PM
To: Ray Fantini <RAFANTINI at salisbury.edu>; David Stinson <arc5 at ix.netcom.com>; Military Surplus Mail List <milsurplus at mailman.qth.net>
Subject: RE: Japanese Chair

25 + years ago I was corresponding with a retired Marine Corp Major who served in the South Pacific in WW2. 

He had been involved with radio communications and written me that the TBW  was most cumbersome and a real pain to set up .And how when he was issued the SCR 299  and back on the islands the first thing he did was ditch in a cave two TBW's and hang on to the RBM rcvrs . He wrote the RBM's were the only sets worth saving. He thought he SCR 299 was just the greatest.

Paul
N6FEG

-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Ray Fantini
Sent: Tuesday, February 14, 2017 7:26 AM
To: David Stinson; Military Surplus Mail List
Subject: [Milsurplus] Japanese Chair

Think that General Vandegrift and the 1st Marine used a lot of captured Japanese equipment including transmitters on Guadalcanal. Can't find it right now but believe that the shore equipment, possibly TBW lacked the range for communications and a captured Japanese transmitter was placed into service for that role at Henderson Field. Do recall accounts of later at Tarawa where radios like the TBX were considered completely unsuitable requiring a large crew and being low powered and when possible a jeep mounted TCS set was far superior. The Navy and Marine units did not appear to have a lot of good choices for short range communications early in the war with sets like the TBY and TBX with something like the TBW being a medium range system but the TCS appears to be an almost ideal platform for short to medium range communications for small craft. Not bad for a set that was basically a civilian design.

Ray F/KA3EKH

-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of David Stinson
Sent: Tuesday, February 14, 2017 9:04 AM
To: ARC-5 <arc5 at mailman.qth.net>; Military Surplus Mail List <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] What is the difference between a RBM andRBSreceiver?

----- Original Message -----
From: "Nick England" <navy.radio at gmail.com>
Subject: Re: What is the difference between a RBM andRBSreceiver?

> http://www.navy-radio.com/xmtrs/ww2/tbw/tbw-rbm-1945-1511.jpg

Interesting things in this 1945 photo shared by Nick England on Milsurplus:  If you look at the radio op on the left, you can see a GF/RU antenna relay on the wall in front of him.  So they had a air-to-ground station here as well as the TBM/RBM to the right.
Not the captured Japanese chairs as well.
And at the extreme right bottom corner is a BC-221.
I would have expected an LM.
Cool photo.  Thanks, Nick!

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