RECEPTION OF FOREIGN BROADCASTS IN RUMANIA

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP83-00415R011900010011-6
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: August 27, 2012
• Sequence Number: 11
• Publication Date: June 13, 1952
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2012/08/27: CIA-RDP83-00415R011900010011-6
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Declassified in Part - Sanitized Copy Approved for Release 2012/08/27: CIA-RDP83-00415R011900010011-6
 Declassified in Part - Sanitized Copy Approved for Release 2012/08/27: CIA-RDP83-00415R011900010011-6 UM
Wilt 1 - ~'U oux i -NUM
Scientific-
ien i c Research Inst Na. Nl1-380 .Magnetron Testing Intr.
Their
C 1-950 development improved over 1948 (Arnstadt)./Nillimeter technique of advantage
50X1-HUM
B Inst. has 2 Universal. Milling Machines (Till Co. Suhl), 4 mechanics lathes in good condition
used mainly for magnetron anodes. Machines accurate to 1/200 mmcontrolled by measuring mi-
croscope. Tests made to polish slots electrolytically., but Russian engineers not interested.
Vacuum measurements are done electrically with Russian instrument which can 1* controlled
by a "Mac Lot" (MacLeod ?) instrument to 10ys mmio 50X1-HUM
magnetron. Students, before final exams., are sent to Institute for a few months of practical
work. Their theoretical education is good: but no practical experience.This they have, to a-
certain extent, when leaving the Institute. This plan, as carried out, forces Lab. into role
of teacher and not that of Researcher..
D
1)
Impulsegenerator - up to 20,000 v, 30 amp, impulse:l microsee. Frequ.up to 1000 cyc]
a)- Impulse generator of German make, known during war as "Schnecke.UU
b)- Impulse amplifier amplifies impulses to above named values
2)
Electromagnetic Rack - fitted with filament transformer and electromagnet; max.
field strength we. poles (15 mm ) approx. 9600 gauss.
3)
Equipmt. for making impulse visible, measures the impulse current and the impulse
voltage, controls shape of impulse.
4)
Wave Meter. - Measurings originally done with thermocouple, replaced by detector
.ich is more efficient. D istaace from magnetron had to be increased aid vibrations at
magnetr.were discovered which had not been known to exist especially for the 4 mm mag-
netron. Wavelength could be determined for a good 8 mm magnetron wth accuracy of 0.01 mm.
At the same time this method of measuring wavers was used to prove existence of multiwave
properties in magnetrons, since during wave measurements different results were obtained
at beginning and end of a rotation of the wavemeter. It was not possible to determine
frequency spectrum since no spectrum analyser was on hand. Some thought was given to
constructing a heterodyne frequency meter.
5) Broadband amplifier - Amplific. approx. 130 x, bandwidth approx 3
6} Power Measuring Instrument - Differences. are measured of temperatures of water
flowing at uniform velocity into and out of container which is heated by HF energy.
7) Galvanometer - (made by Dr.Lange Plant). Sensitivity approx. 2.10 - 8 amp Three or these are in use at the Institute. 50X1-HUM
8) Field Strength Meter ( AEG )
50X1-HUM
Only one small series of L each 4 mm magnetrons was built. The total of 3 series of the
8 mm series had 8- 10 magnetrons each. The cathode diameter of the nickel tube was 4.8 mm
for the 14 mm, and 1.8 - 1.9 mm for the 8 mm.-magnetron. The length of both cathodes was 10 mm.
In the early 1950 an output of 4% was obtained from the 8 mm magnetron with a magnetic field
of 6000 gauss. In July 1950 a field of 11000 to 12000 gauss gave 12%.Of the 8 mm magnetrons
only about 2 of ea. series were successful, i.e. 6 units. Only 1 sample of the 4 mii magne-
trons-could. be used. The 8 mm sample wasbuilt into the test transmitter; these were appa-
rently radar instruments since the radar lab. showed great interest in the development of
the 8 mm magnetron. Special emphasis was laid by them on the accuracy of the 8 mm wave-
length. The 4 mm. magnetron was accidentally destroyed. 50X1-HUM
OCURI At W.191ALS Rai LY
but Russian advantage is in numbers of young people given a chance o work with
Declassified in Part - Sanitized Copy Approved for Release 2012/08/27: CIA-RDP83-00415R011900010011-6