The direct thermal type 钍-tungsten cathode triode 805 can be used for class B, A-F, R-F power amplification, class C R-F power amplification and high frequency oscillation.
The 805 is similar to the GL-805 and is interchangeable.
Filament heating
Uf ..............................10 V
If..............................3.25 A
Interelectrode capacitance
Input capacitance........................8.5 PF
Output Capacitance........................10.5 PF
Cross-channel capacitance........................6.5 PF
Limit rating
Anode voltage........................1500 V
Anode dissipated power..................125 W
Operating frequency and anode voltage
When the operating frequency is above 30MC, the anode voltage and anode input power will be reduced according to the following table:
Frequency (MC) anode voltage and anode input power
B pole electrode C-class telephone anode modulation telegraph
30 100% 100%
45 90% 82%
80 71% 55%
Recommended working status (reference value)
Class B A-F power amplification (two tubes) limit value
Ua...........................1250 1500 1500 V
Ia(max.sig.per tube)...............210 mA
Pa(in)(max.sig.per tube) z...315 W
Pa (per tube) ...........................125 W
Ug..........................................-16 V
Üg(pk).....................235 280 V
Ia(0)........................148 84 mA
Ia(max.sig)...............500 600 mA
Pd..............................6 7 W
RL(a-a)........................6.7 8.2 kΩ
Pout(max.sig)............300 370 W
Class B R-F power amplification
(The maximum modulation factor of each tube is 1.0 under carrier conditions)
Limit value
Ua..................1250 1500 1500 V
Ug..............................-10 V
Ia..................135 115 150 mA
Pa(in)..........................................185 W
Üg(pk)............70 70 V
Ig..................15 15 mA
Pd..................11 7.5 W
Pout...............55 57.5 W
Class C R-F power amplification and oscillation (anode modulation)
(The maximum modulation factor of each tube is 1.0 under carrier conditions)
Limit value
Ua..................1000 1250 1250 V
Ug..................-155 -160 -500 V
Ia..................160 160 175 mA
Ig..................60 60 70 mA
Pa(in)....................................220 W
Pa..........................................85 W
Üg(pk)............295 300 V
Pd..................16 16 W
Pout...............110 140 W
Class C R-F power amplification and oscillation (anode modulation) (if there is no modulation for each tube under keying conditions)
Ua..................1000 1250 1500 1500 V
Ug..................-95 -100 -105 -500 V
Ia..................200 200 200 210 mA
Ig..................40 40 40 70 mA
Pa(in)................................................315 W
Pa......................................................125 W
Üg(pk)............225 230 235 V
Pd..................8.5 8.5 8.5 W
Pout...............130 170 215 W
For delivery time:
Generally, we will dispatch the items within 7 days upon order confirmation; some items may need 15~21 days to get ready for delivery, then we will try our best to dispatch as soon as possible, or we will contact you and offer advice.
For Bulk order:
If you would like to place a bulk order, please contact us for better price and better delivery cost.
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