[MrFixr55]

Hi RGK,

A couple of things:

When you stated that you checked the chassis ground points and found them at 0V, what did you check them against? There should be about 18V or more between chassis ground and the center tap of the transformer.

The AVC voltage seems a little "low" to me, high being a more negative voltage. for example, to cut the transconductance down to 2 micromhos (minimum stage gain), the tube requires a grid bias of -38V, so a strong signal from a local station should generate a rather negative voltage, which can be read with a DVM (or VTVM if you have one of those). Do not use an analog VOM like a Simpson 250; the input impedance will be too low. The AGC circuit can generate a rather negative voltage, but the current is absolutely miniscule. So, if you have low volume and low AGC voltage, you have a gain issue in the RF and IF sections or an issue with the detector. If the RF or IF stage is overdriven to clipping and AGC is only around -2V, then check the 100pF Cap # 23. Consider changing it. This is what sends IF signal to the AGC diode, so if this cap is bad, no AGC. A strong station may overload the RF and IF stages to the point where there is little signal amplified. However, I suspect that there would also be distortion. However, your symptoms of varying volume may point to this as being an issue.