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Resistor question

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#141
SY said:
On UFO buff websites, you can undoubtedly get many people to agree on the reality of alien abductions and anal probes, with exactly the same quality of evidence that you're presenting.
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😀 , anyway, try an iron steel FM receiving dipole antenna and compare it with a copper made one 🙂
Hmm i've tried different french potatoes with different oils and never got the same 🙂
 
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#146
20to20 said:
Addressing the original post questions... Just sub in a different 390K resistor instead of changing the value. That's just basic scientific method. Basic.

20
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I subbed it for 390k Allen Bradley's. So original value.
The change in sound had nothing to do with the value, but all with the difference between the cheap stock metalfilm resistors and the Allen Bradleys.

My original question was what does the value in that spot do and what would changing the value do.
 
#147
Dephazer said:
I subbed it for 390k Allen Bradley's. So original value.
The change in sound had nothing to do with the value, but all with the difference between the cheap stock metalfilm resistors and the Allen Bradleys.

My original question was what does the value in that spot do and what would changing the value do.
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Ah.. found it.

Hope it goes well from here. Trying to find a replacement Vol. conrol is going to be a challenge. Not many stereo pots made anymore.

G'luck

20
 
#151
Dephazer said:
If I want to use it as just a poweramp, I can just take the volume pot out and connect the signal wires straight to the drivertubes, right? I mean the volume would be regulated by the external preamp ...
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Just solder a jumper across the Vol. pot input terminals to the wiper terminals. You could use some clip leads there to make it easily removeable, too.

If that pot is only 20K then you have to have a 20K resistor to ground there to set the input impedance properly as if the vol. pot was still there in parallel to the 390K one.

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#153
rayma said:
Well, there certainly are measurable differences. Steel has hysteresis and is usually magnetic (except for special types). This may be a reason that steel conductors have a different sound quality than copper. Of course, some may not agree that there is a difference anyway., but that's what makes horse races.
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Yes I would 1st make sure there is an audible difference before starting to speculate what it would be caused by. But, hey, who cares for logical thinking in this post-fact society of ours 😱

Jan
 
#154
20to20 said:
Just solder a jumper across the Vol. pot input terminals to the wiper terminals. You could use some clip leads there to make it easily removeable, too.

If that pot is only 20K then you have to have a 20K resistor to ground there to set the input impedance properly as if the vol. pot was still there in parallel to the 390K one.

20
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Slight correction:

Disconnect the wiper lead and solder it to the vol. pot input terminal. This takes the pot wiper off the circuit but leaves the pot resistance to ground in place.

Sorry for the confusion. The other way would still allow the grid to be grounded through the vol. pot if you turned it down. The source would be, too. But you gotta keep the 20K to ground in there.

20
 
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#156
godfrey said:
Indeed! I get the distinct impression some fo the posters here have been smoking the snake oil rather than just drinking it.

BTW: How do I get in on this whole anal probing thing SY keeps going on about? Sounds like fun!
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1 - go to an urologist
2 - pretend your 60+ years old
3 - complain of painful peeing.

Guaranteed fun!:spin:

Edit: Said the doctor: 'Mr. Didden, I can feel how old you are, but nothing is wrong with you'.

jan
 
#158
20to20 said:
Slight correction:

Disconnect the wiper lead and solder it to the vol. pot input terminal. This takes the pot wiper off the circuit but leaves the pot resistance to ground in place.

Sorry for the confusion. The other way would still allow the grid to be grounded through the vol. pot if you turned it down. The source would be, too. But you gotta keep the 20K to ground in there.

20
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Lemme recap, disconnect volume pot output (L+R) and solder them to the input.

At the moment if I put the volume on the amp full and control the volune with my standalone preamp the sound seems to lack when i play at low volume. If i control the volume with the amp instead of preamp this doenst happen. Is ghat volume pot rewiring going to influence that?
 
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