I propose this matched pair (two tubes) type MT31 made by Marconi in Italy in perfect NOS NIB conditions as You can see
Metal base, all labels originals, Original boxes.
These wonderfoul tubes are DIRECT HEATER TRIODE with Round Plate -> Wonderfoul Sound in audio Equipment!!
Here You are Specifications of these tubes ) PLEASE SEE BELOW FULL DATASHEETS (pictures below please scroll down !!) INCLUDING GRAPHICS CURVES AND ALL YOU NEED !! PICTURES ALSO OF ORIGINAL TRANSMITTER R.A. 350/I Transmitter of Italian Army (year 1935) PLEASE SEEL BELOW ON THIS PAGE SCROLL DOWN UP TO THE BOTTOM OF THIS PAGE!!
Vf=10 Volt
If=4,8 Ampere
Plate=1.600Volt
Similat to RS237 Telefunken and 211 RCA
Transmitting tubes made in Italy and Employed in R.A. 350/I Transmitter of Italian Army (year 1935) WW2 very early tubes!! Never seen before in these Wonderfoul conditions.
Specifications:
I will ship these two tubes Worldwide with FREE SHIPPING FORMULA (of course You will get the Tracking number of shipping)
Shipping will be safe with professional wrap..
Shipping Worldwide (NO OCEANIA: No Italy)
Payment: By Paypal directly at the end of the auction -> Safe way for each others
Returns: Accepted, BUYER pays shipping costs of returns
Bid with Confidence!
All the Best
Below My testing Equipment (NOT FOR SALE!) BELOW THE ORIGINAL TRANSMITTING RA350/I PLEASE SEE ALL PICTURES BELOW (SCROLL DOWN ALL PAGE...)
The R.A. 350/I designed by Allocchio Bacchini in
Milan, is a three tubes transmitter. Can be operate in three ranges frequency.
35 – 85 meters OC 205 – 360 meters OM 300 – 960 meters OM later model of AR-8
receiver. Used in "Regia Aeronautica" for a general purpose and
mounted in Cant.Z 1007 S.79 Bomb S.79 Silur. Cant.Z 501 S.81 Ro.37 Used also by
"Regio Esercito" for interarmy cooperation.
Frequency:
35 – 85 meters OC
205 – 360 meters OM
300 – 960 meters OM R.F.
Output: 130watt
Type of signals: Phone, C.W.
Tubes: 1 x Telefunken RS-69 2 x MARCONI MT-31
Power supply: 12V 1700V
Dimensions: 364 x 364 x 260 m.m.
Weight: kg 18.6
Manual: Regia Aeronautica
