Subminiature tube CK526AX
 

Hi,
I would like to use this tube for QRP purposes. Anybody out there with
schematics, plans, experience etc.?
Tnx
73
Fred

Subminiature tube CK526AX
 

Fred wrote:
Hi,
I would like to use this tube for QRP purposes. Anybody out there with
schematics, plans, experience etc.?
Tnx
73
Fred
http://www.google.com/url?sa=t&sourc...EJccu06qj-hsuA

seems to be a battery directly heated pentode / beam power tube.
Max ratings:
Vf = 1.25 +/- 20%
If = 20ma
Vp = 45v
Vg2 = 45v
Ik = 1ma

Typical operation:
Vp = 22.5v
Vg2 = 22.5v
Vg1 = -1.5v
Peak grid signal voltage 1.5v
Ip = .45ma
Ig2 = .12ma
Transconductance 400umhos
Rp = .22meg ohm
Rl = .05meg ohm
Distortion = 10%
Power out = 3.75mw

lead 1 = plate (red dot)
lead 2 = G2
lead 3 = F+
lead 4 = G1
lead 5 = F-

G3 (deflector plates) internally connected to filament.

Subminiature tube CK526AX
 

Thanks Ken,
now I'm looking for receiver and or transmitter circuits for this
tube.
Tnks
73
Fred.

Subminiature tube CK526AX
 

Fred wrote:
Thanks Ken,
now I'm looking for receiver and or transmitter circuits for this
tube.
Tnks
73
Fred.

http://schmarder.com/radios/tube/index.htm
He has a project using a sub-mini tube that you could adapt