I do not think it is a 1M logarithmic volume control that might be rare.
Might be now, but they weren't in your day AG
Plenty of 1M log pots used as volume controls in valve amps.
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I do not think it is a 1M logarithmic volume control that might be rare.
I did find some on ebay but wouldn't having linear pot defeat the purpose of having an amp to listen to use? I'm guessing there would be no way around the 1m pot either way?The DC volume control is an ordinary 1M linear potentiometer available at any electronic parts distributor. Digikey has thousands in stock of 74 different manufacturers, shapes and sizes.
I do not think it is a 1M logarithmic volume control that might be rare.
a 1Meg pot with "A" taper is log taper, so the part would be marked "106A". a linear taper would be a "B" taper, so it would be "106B". whether the pot is used for a control voltage, feedback loop gain set, or input voltage divider, the effect of the log taper is the same, so yes, you want a log taper pot.I did find some on ebay but wouldn't having linear pot defeat the purpose of having an amp to listen to use? I'm guessing there would be no way around the 1m pot either way?
ebay sells fake or defective junk. Factory rejects are cheap but work poorly if they do anything.I did find some on ebay but wouldn't having linear pot defeat the purpose of having an amp to listen to use? I'm guessing there would be no way around the 1m pot either way?
....ebay sells fake or defective junk. Factory rejects are cheap but work poorly if they do anything....
I would be running it through 8 ohm speakers. How will that change the the component needed?A resistor in series with the battery will cause the supply voltage to the Jfet preamp and amplifier IC to jump up and down as you play, causing severe distortion on the loudest sounds.
The TDA7052A amplifier was designed to use a 6V power supply and drive an 8 ohm speaker but you are overloading it with a 9V battery and a 4 ohm speaker. The overloading will cause it to overheat and it will protect itself by reducing the gain as you play music. Then the volume will suddenly drop then slowly increase over and over.
Try adding an 8.2 ohm 1W resistor in series with the 4 ohm speaker and use a new 9V battery. The resistor will cause the speaker to sound boomy and muddy on low frequencies and reduce the maximum output power to about only 0.3W.
I would be running it through 8 ohm speakers. How will that change the the component needed?
The schematic simply shows which connects to what. You show a video of it working, isn't that your messy breadboard in the video? Many electronic circuits do not work when built on a breadboard.So I got all the parts but I'm having trouble putting it together on a bread board and getting it to work. Perhaps it's my lack of understanding of how to read the schismatics or perhaps my dyslexia is getting the best of me again but I'm having trouble seeing how it all fits together. Could someone offer some help in that respect please?
So I got all the parts but I'm having trouble putting it together on a bread board and getting it to work. Perhaps it's my lack of understanding of how to read the schismatics or perhaps my dyslexia is getting the best of me again but I'm having trouble seeing how it all fits together. Could someone offer some help in that respect please?