UY42_Datasheet

UY42_Datasheet
UY 42 Halt-wave rectifying valve
a 4
a
;
=
SE
LL i =
Fig. 1
The UY 42, showing the electrode system (approximately actual size).
The UY 42, in common with the UY 41, is a high-vacuum, indirectly heated
half-wave rectifying valve capable of delivering a maximum of 100 mA direct
current, but, whereas the UY 41 is suitable for all conventional mains
voltages up to 250 Vrus, the UY 42 can be used only at voltages up to
110 Vzys. The reason for the development of this valve to supplement the
UY 41 will be seen on comparing the regulation of the two valves for a
mains voltage of 110 V: on A.C. mains, the D.C. output of the UY 42
is about 10 V greater than that of the UY 41, and on D.C. mains about
5 V greater. According to the operating characteristics of the output valve
UL 41, such a rise in supply voltage increases the output of this valve by
about 259%, (roughly 12% on D.C. mains). In view of the relatively low
output of the UL 41 at a supply voltage of the value in question, this may
be regarded as a distinet advantage.
The higher output of the UY 42 has been secured by reducing considerably
the internal resistance as compared with the UY 41 (cf. the I,/V, charac-
teristics of the two valves).
If it is intended to employ the UY 42 on mains voltages over 110 V, a limiting
resistor should be included in the anode circuit to suppress sputtering
(momentary flash-over between anode and cathode). At the same time,
this completely counteracts all the advantages of the valve, for which reason
the UY 41 is the obvious choice for higher mains voltages.
249
UY 42
TECHNICAL DATA OF THE HALF-WAVE RECTIFIER UY 42
Heater data
Heating : indirect, A.C. or D.C., series feed
Heater current . . . . . . I;
Heater voltage . 2. Й,
Operating characteristies and limiting values
Mains voltage . . . . . . Fi
Rectified current . . . . . I,
Input capacitance, smoothing
filter . . . . . . . . . Cru
Limiting resistance . . . . . A;
Peak voltage between heater and
cathode . . . . . . Vir
kf f
Fig. 2
Electrode arrangement, electrode connections and maximum
dimensions in mm of the UY 42.
250
— 100 mA
= 31 V
= max. 110 VRMS
— max. 100 mA
= max. 50 pF
= 0 Q
— max. 350 У
A À
©
o
E
E
q
y
HILL y
Jrax 22, 64191
UY 42
‘SuIBUI |)" uo parezedo AIBA : OAIND IOMOT]
‘SuTEUI ‘()'Y UO poyriodo earea : eaano Jedd
‘(7 queormo qndAmno ‘GG oy9 J0 UOIJOUN] SB °A
eseios andino) ¿F An 941 Jo UOore[nsey
F “SA
CC 9% 08 09 Ob oe 0
£6179
(PA) eSeIj04 1091rp perrdde ey) JO
uorgouny 8 s® gH AX) 0U1 JO (”7) 1UELINO epouy
Я
e Sig
OL
LT
61
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement