[R-390] Today's Line & Local experiment

Craig Heaton hamfish at efn.org
Wed Jan 1 20:43:26 EST 2014


Well, once again the Collins designed boombox has crushed its opponent, me!
The too loud Amelco is still too loud. So with that, I did try adding some
resistance to terminal #1 of the Local pot R105. As a matter of fact, up to
10K of resistance. Little change and nothing to write home to mama about.
But I do have more numbers to chew on for those that wish to partake. 

Might add at this point, the beast arrived in this condition. R105 was a 5K
pot when I brought it home and started restoration. So, it has been too loud
for some time for other owners. 

Numbers to chew on: All taken from terminal #1 of R104 & R105. They are the
same values, so let's keep it simple....just terminal #1.

                    NO Signal (antenna disconnected)
Amelco              0.35VAC
Amelco              6.4VDC

Motorola         0.01VAC
Motorola         7.5VDC

	  Signal (neighborhood RFI, grow lights & plasma TV)
Amelco            4.5VAC
Amelco            6.7VDC

Motorola        2.6VAC
Motorola        7.6VDC

Signal = antennal connected to a full wave loop cut for the 75 meter band,
receivers tuned to 3.880 with no stations on or nearby. 

If there is time tomorrow the beast will be flipped belly side up and some
of the cables will be checked again. 

Fingers crossed,
Craig

                    



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