[R-390] Below 8mhz problem

[Jim Temple]

Hello to the list,

As an update, I have found that E209, before the 1st mixer has low voltage.
It should be approx -6.5 volts, and it actually is -.85.  Measured with a
1meg resistor it is -.76.

The other RF deck test points have good voltage.

The faint cal signal below 8mhz is the same on all bands below 8mhz.  This
prevents me from hearing the signal generator signal needed to calibrate the
variable IF section.  The cal signal on all bands 8mhz and above is strong
and loud.

I have received suggestions to:

1.  Check all the appropriate coils, switches, antenna relay, and anything
that plugs in or wipes, before the 1st mixer v202, due to corrosion
suspicions because of the "massacre" origion of the radio.

2.  Check HR202 crystals, especially 17mhz.

3.  Inspect circuitry between 1st mixer V202 and 1st crystal oscillator
v207.

The crystal seems to be OK, because I purchased a spare HR202 with the
radio.

I have substituted the 6c4 and 5654 tubes V202 and V207 with no change.

Thanks for the suggestions, and tomorrow I will get deeply into the above
suggestions.  So long for now.

Regards,

Jim
73, KF4ICZ