Trip Report - Traveling Wave Tube Amplifier

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-02820A000500020027-5
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: November 17, 2016
• Document Release Date: September 4, 1998
• Sequence Number: 27
• Publication Date: April 14, 1959
• Content Type: TRIP

Approved For Release 2000/09/11: CIA-RDP78-02820A000500020027-5
The F
Pa
600, T.O. 1
Report Traveling
On 25 March 1959
ries, Sunnyvale, C
600, Task Order 1,
of the HA-36? Ha-45,
The
with
April 1959
er
signed? tor progriggil
visited the
g for the development and fabri-
7, EA-'45 and HA-49 traveling; wave
maiiiiiiimminthesctubes was dis-
Laboratories.
2. The HA-43 will be a by noise solenoid-focused tube
?panting in the 0.5 to 1 kilsmegacycle raage. Dein shall be greeter
than 25 db and the noise flgare shall be less than 10 db. The first
engineering; model of this tube has been produced, and tests indicate
that the noise figure will be as low as 6 to 7 db. The first model
of this tube should be ready for deltreryidAhin 2 weeks.
3. The HA-.36, A permanent-magnet-focused tube operating in the
0.5 to 1 kilomeemele range, is specified as Wring a gain greater
than 30 db and a noise figure less then 25 db. The first engineering
model of this tube has alio been eompleted and deliveries should
commence within 2 to 3 weeks.
4. The HA-47 is a low noise tube opereting inthe4.to8kc
range. Its gain shall be greater than 25 db and the noise film
less than 10 db. This tube will be of immediate value to the
antenna installation, where it will be used to replace the Band 6
antenna pre-amp TWT, which has a noise figure of elgroalmately 17 db
over most of the band, and more at the edges of the bend. The goal
of 10 db noiee figure has not yet been reached, but the rate of
progress on the tube indicates that coeptable engineering model
should be ready for delivery within 1 or 2 'oaths
5. The HA-48 and HA-49 TWIlts are designed to operate in the
12 to 16 kaa range. The HA-48 is solenoid-focused, will hsve a gain
greater than 25 db? and a noise figure less than 13 db. The HA-49
will be permanea-magnet-foeused? will have a gain greater than 30
db and a noise figure less than 30 db. Development of these tubes
has not progressed as rapidly as development of the other tube types
due to the greater difficulties encountered in fabrication of TWT
design for higher frequencies. It appears reasonable to expect,
however, that the first models of these tubes should be ready for
delivery within the next 6 weeks. The expiration date of this con-
tract is 14 May 1959. It is apparent that a time extension will be
required in order to complete the work provided for under the task.
Approved For Release 2000/09/11 ? ? B8-02820A000500020027-5
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Approved For Release 2000/09/11 : 78-02820A000500020027-5
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