Thanks,
Dave
Not sure which thread pertains to the latest?
Are stations compressed or spread out on the dial. If so the IF frequency isn't quite right? No padder cap in Farnsworth ET-066 so can't adjust for the low end of the band.
Norm
:Hello,
: Something has got to be wrong but I cannot find any problems with anything. When I have an external antenna attached to the antenna lead that's not physically attached to the main loop antenna, as shown in the schematic, I can adjust the antenna trimmer so that the stations at the upper end of the band come in very loud and clear. However, the stations at the low end of the band are weak, no matter how the antenna trimmer is adjusted.
: If I disconnect the antenna wire, I can adjust the antenna trimmer so that the stations at the lower end of the band are stronger but nowhere near the strength the upper stations were with the antenna wire attached. Without the antenna wire attached there's absolutely no way to get the upper part of the band loud, it stays really really weak. What's going on? The loop antenna is not open. It is connected to where it's supposed to be connected. All the paper and filter capacitors were replaced. A couple of mica capacitors were also replaced (100pf and 47pf), but it makes no difference at all. I checked everything against the schematic, and nothing seems to be wrong but all is weak. All the resistors are the correct value as well. The oscillator is working. I can adjust the oscillator section of the tuning capacitor and it can shift where the stations appear on the ban. Please help.
:
:Thanks,
:
:Dave
Thanks,
Dave
:Dave
:
: Not sure which thread pertains to the latest?
:
: Are stations compressed or spread out on the dial. If so the IF frequency isn't quite right? No padder cap in Farnsworth ET-066 so can't adjust for the low end of the band.
:
: Norm
:
:
:
::Hello,
:: Something has got to be wrong but I cannot find any problems with anything. When I have an external antenna attached to the antenna lead that's not physically attached to the main loop antenna, as shown in the schematic, I can adjust the antenna trimmer so that the stations at the upper end of the band come in very loud and clear. However, the stations at the low end of the band are weak, no matter how the antenna trimmer is adjusted.
:: If I disconnect the antenna wire, I can adjust the antenna trimmer so that the stations at the lower end of the band are stronger but nowhere near the strength the upper stations were with the antenna wire attached. Without the antenna wire attached there's absolutely no way to get the upper part of the band loud, it stays really really weak. What's going on? The loop antenna is not open. It is connected to where it's supposed to be connected. All the paper and filter capacitors were replaced. A couple of mica capacitors were also replaced (100pf and 47pf), but it makes no difference at all. I checked everything against the schematic, and nothing seems to be wrong but all is weak. All the resistors are the correct value as well. The oscillator is working. I can adjust the oscillator section of the tuning capacitor and it can shift where the stations appear on the ban. Please help.
::
::Thanks,
::
::Dave
Thanks,
Dave
:Norm,
: I have been waiting for many hours for this to post. It has taken a long time to appear. This does pertain to the other thread. I thought it deserved a different topic from the first because the strange problem is the fact that I hear a hum while the radio is powering down, after the power is shut off. THe capacitor negatives are connected to the wrong terminal on the power switch, I think.
: Anyway, this is the the weak reception problem I was discussing in the other thread, since this one never appeared until you replied to it.
:
:Thanks,
:
:Dave
::Dave
::
:: Not sure which thread pertains to the latest?
::
:: Are stations compressed or spread out on the dial. If so the IF frequency isn't quite right? No padder cap in Farnsworth ET-066 so can't adjust for the low end of the band.
::
:: Norm
::
::
::
:::Hello,
::: Something has got to be wrong but I cannot find any problems with anything. When I have an external antenna attached to the antenna lead that's not physically attached to the main loop antenna, as shown in the schematic, I can adjust the antenna trimmer so that the stations at the upper end of the band come in very loud and clear. However, the stations at the low end of the band are weak, no matter how the antenna trimmer is adjusted.
::: If I disconnect the antenna wire, I can adjust the antenna trimmer so that the stations at the lower end of the band are stronger but nowhere near the strength the upper stations were with the antenna wire attached. Without the antenna wire attached there's absolutely no way to get the upper part of the band loud, it stays really really weak. What's going on? The loop antenna is not open. It is connected to where it's supposed to be connected. All the paper and filter capacitors were replaced. A couple of mica capacitors were also replaced (100pf and 47pf), but it makes no difference at all. I checked everything against the schematic, and nothing seems to be wrong but all is weak. All the resistors are the correct value as well. The oscillator is working. I can adjust the oscillator section of the tuning capacitor and it can shift where the stations appear on the ban. Please help.
:::
:::Thanks,
:::
:::Dave