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My thinking is that the directory where all the posts I deleted ended up is full, generating the error.
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I tried again with a different computer on my library's wifi and got the same error.
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I'm still getting the error, even on a new window. Will check with a different computer, different ISP.
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The Sunn site: https://forum.sunnstillshines.online/index.php is giving me a database error today.
There has been a low level spam attack on...
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The odd thing about that circuit is that they wasted three 5W resistors and a couple of zeners to get the DC heater Voltage.
Want to hear what...
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Check the Plate Voltages on V6. That's pins 1 and 6. Compare those to Voltage on pins 3 and 8. If the Voltage difference between the two is too low, Grid...
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An important addendum to this question is; where does the red wire with the yellow stripe ( high Voltage center tap ) ground ?
Grounding the...
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One thing that hasn't been looked at on this 200S amp is where and how those new caps in the power supply are grounded. With those little humps in the scope...
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The first thing you need to know about how to operate an oscilloscope with a 10X probe is how to adjust "Probe Compensation". This adjusts the probe...
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I think you need to ground one side of the heater supply or use and artificial center tap.
Re-draw the schematic.
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Does the Voltage on pins 1 and 3 of the 6AN8 change when you do these steps ?...
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The RCA data sheet for the 6AQ5A lists Maximum Plate and Screen Voltages at 275V (class A amp), but the plate curves for pentode and triode operation both...
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There is an arm you can get for the more expensive Jig Saws. Locks in place with a thumb screw. A nail acts as a pivot.
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There can be issues with terminal strips that are riveted to the chassis. If there is a ground connection relying on one of those rivets, get out your big...
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The wiper of the Treble pot goes to pin 8 of the 6AN8. Check that there is a 1 Meg resistor from pin 8 to ground. Is there an DC Voltage on that wire from...
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I have come to rely on Firefox's spelling correction. Now that I'm also using a Chromebook computer, it has some rudimentary grammar correction.
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I think there is a forum on Duncan's website where you can ask questions about the operation of PSUD. IIRC I ask the question about resistance spec of a center...
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This is a simulation of a typical class AB guitar amp. The two numbers next to current loads I1 and I2 represent plate and screen nodes at idle and full load....
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