I have a Halson Model 606 radio I've been working on. I'm having trouble figuring out why the 6E5 isn't deflecting. The schematic shows a 1 meg resistor across the plate and anode, and I know they sometimes put this resistor in the socket. I can't figure how to get the socket apart---it almost looks like the pins and wires were put in first, then a insulating wafer was riveted in on top of the pins to hold them in place. Someone put a 1 meg resistor on the B+ line feeding the eye (this is not an original resistor)..So I am confused if this 1 meg res. is the resistor shown in the schematic, or is there one hidden in the socket, and this 'new' res. is not needed. Basically I need to open the socket, but I don't want to destroy it...any ideas?? The schematic is listed on this website I you want to look at it.

the resistor is inside the socket. You can solder a 1 meg resistor to the base of the pins of the 6E5. leave the resistor leads just long enough to hang out the side of the base. It will still fit fine in the socket. remove the added resistor. Someone miss read the schematic before. There are two pins inside the socket for the resistor, and only one wire comes out.

The 1 meg resistor is from pin 2 to pin 4 on the 6E5

Looking at the tube socket this morning, I got lucky and got insulator wafer out. There is no resistor there, no room either to mount it. The 1 meg I found, apparently was the correct part, just mounted on the circuit instead of socket. Looks like I'll have to chase the AVC circuit...got to read up on how that works.

BrianC,

If the resistor is not in the socket, then I suppose there are 6 wires going to the socket?

Clifton

:Looking at the tube socket this morning, I got lucky and got insulator wafer out. There is no resistor there, no room either to mount it. The 1 meg I found, apparently was the correct part, just mounted on the circuit instead of socket. Looks like I'll have to chase the AVC circuit...got to read up on how that works.
:

:BrianC,
:
:If the resistor is not in the socket, then I suppose there are 6 wires going to the socket?
:
:Clifton
:
Correct---6 wires to socket.

BrianC,

For a quick check you could use a 9 volt transistor battery and a couple clip leads. With the radio on, connect the clip leads to the terminals of the battery and ground the lead from the battery plus to chassis and connect the lead from the minus of the battery to pin 3 (grid) of the 76 detector tube. This should close the eye on the 6E5. If not, then trace with the 9 volts toward the connection of 6E5 grid into the AVC circuit.

Clifton

::BrianC,
::
::If the resistor is not in the socket, then I suppose there are 6 wires going to the socket?
::
::Clifton
::
: Correct---6 wires to socket.
:

:Clifton
Thanks, I put the -9v bat at the 3 pin (grid) of the 76 tube and got a very small amount of closure of the eye. As I moved it towards the 6E5 grid in the circuit, thru the 51k and 500k resisitors, I got full closure of the eye. So the eye will respond. Am I just not getting enough AVC voltage to it? The AVC voltage maxes @ -1 volt. I've checked out 500k resistor and .05 cap that Norm mentioned in my other related thread, they're OK. Any other ideas?

If your radio is not in good alignment the radio thinks the signal is low. The AVC voltage will always be low. What you can try is to tune the radio to a known strong local station. Tweak the 2nd IF adjustments while watching the tuning eye. If the radio improves in performance and the eye tube shows movement, then try tweaking the 1st IF. The eye tube being on the AVC line is an indicator of the signal strength.

OK, thanks for the help guys.... I finally found the culprit(s). The volume control had changed to a 10k pot, should have been 500k. I guess most of the AVC signal was bleeding thru to ground (?). I noticed the volume couldn't be 'shut off' completetly, but never realized it could be part of the problem. Unrelated, I found that an 80mfd filter cap was being used in a B+ circuit feeding the tuning section. It only needed a 4mfd cap per schematic. Good signal now....Got to move on and fix other issues.