[ARC5] Japanese technology

[J. Forster]

In fact, the pulse triodes like the 15E and it's bigger brother were
widely used in UHF RADARs, both airborne and shipboard.

Both my ASB-5 and one of the search RADARS on the B-59 use such triodes in
high power ring oscillators. The sets are capable of 50 kW pulses for a uS
or so.

S or X band RADARS had the advantage of much higher antenna gain for a
given size, which helps both on Tx and Rx.

While on the subject, does anybody have an OAW tube tester lying around? I
have a pile of 15Es that I'd like to test and match.

Best,

-John

===========-


> The US was not that far behind and the others were not that far ahead. The
> US lacked the cavity magnetron, but had the reflex klystron and the TR/ATR
> system. Look how much air-to-air radar used simple triodes like the 15E.
> The
> US also fielded S-band radars using lighthouse tubes. Fortunately the US
> shared technology with the British.
>
> John  WA4WDL
>
> --------------------------------------------------
> From: "Sandy" <ebjr37 at charter.net>
> Sent: Saturday, March 24, 2012 4:40 PM
> To: <kgordon2006 at frontier.com>; <ARC5 at mailman.qth.net>
> Subject: Re: [ARC5] Japanese technology
>
>> We were way behind in radar as well until the "Cavity Magnetron" opened
>> up
>> the microwave spectrum for high resolution radar technology.  Nowadays
>> we
>> have much superior microwave receiving gear due to solid state
>> amplifiers
>> making the receivers MUCH more sensitive!
>>
>> Anybody interested in "torpedo troubles" that our submarine fleet had
>> should
>> research the writings of a sub skipper named Dudley "Mush" Morton, who
>> commanded the fleet boat "Wahoo".  Edward L. "Ned" Beach also wrote
>> quite
>> a
>> bit about torpedo problems in his writings about the failure of many
>> torpedoes which killed not a few of our sub crews and blunted the
>> efforts
>> of
>> others.
>>
>> 73,
>>
>> Sandy W5TVW
>> -----Original Message-----
>> From: Kenneth G. Gordon
>> Sent: Saturday, March 24, 2012 1:29 PM
>> To: ARC5 at mailman.qth.net
>> Subject: Re: [ARC5] Japanese technology
>>
>> On 24 Mar 2012 at 14:07, gordon white wrote:
>>
>>>      While they were behind in radar,
>>
>> And, IMHO, in squad and aircraft communications...
>>
>> I understand that, at least early in the war, Japanese pilots would
>> routinely
>> remove their radios because they were so worthless, and that would
>> enable
>> them to carry a bit more ammo.
>>
>>> their night-fighting at sea
>>> techniques were ahead of ours in 1941-42 (Maybe the Germans were
>>> giving them superior Zeiss night binoculars?)
>>
>> Yes, but when we finally added radar-fire-direction capabilities to our
>> ship-
>> board fire control computers, our forces took a quantum leap in
>> night-fighting
>> capability and effectiveness. An incident mentioned here concerning the
>> Battleship "Washington" supports this opinion.
>>
>>> and their long-lance
>>> torpedoes were way ahead of ours for quite a while.
>>
>> OH, YES! Our torpedoes were a real and very serious scandal from early
>> to
>> practically mid-WWII. They were pretty much worthless, and were the
>> cause
>> of many deaths and failures. I cannot understand how that situation was
>> let
>> go on for so long. It really and seriously stunk to high heaven.
>>
>> The Japanese Long Lance torpedo was a real masterpiece of design and
>> implementation, and was very effective.
>>
>>> Our superior
>>> technologies took a while to get into service as did our superior
>>> production. As Yamamato said. "I'll run wild for six months" then
>>> watch out. From December 7, 1941 to June, 1942 (Midway) he did.
>>
>> I always liked his "...behind every blade of grass..." statement. :-)
>>
>> Ken W7EKB
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