-
-
drteming replied to the thread Little Dot Mk II Rebuild.The coupling cap at input was initially after the potentiometer. That's usually what I do for my amp builds. The coupling cap keeps... -
drteming replied to the thread Little Dot Mk II Rebuild.Nah, I just had a couple of good 4.7uF caps lying around. If you have good low ESR electrolytic, then 0.47uF is likely all you'll need...
-
drteming replied to the thread Little Dot Mk II Rebuild.That's the stepped attenuator that I used. It worked great. Well balanced, no appreciable noise. I used that attenuator because I had...
-
drteming replied to the thread Little Dot Mk II Rebuild.The filament voltages were right around 6.3 volts, but the mains voltage was 123V at my house. Undervolting filaments definitely...
-
drteming replied to the thread Little Dot Mk II Rebuild.As far as hum reduction goes, elevating the cathode of the EF95, the voltage amplifier, is more important. However, elevating the...
-
drteming replied to the thread Little Dot Mk II Rebuild.I wonder if the power ground is separate from signal ground. I didn't check on the PCB before I trashed it. The case is anodized, so...
-
-
drteming replied to the thread Little Dot Mk II Rebuild.Yep. From the factory, the heater center tap for the 6AK5 tubes are elevated above ground. It was only 5V or so iirc. The heater...
-
drteming replied to the thread Little Dot Mk II Rebuild.The Little Dot 1+ is a totally different animal than the Mk II, and I have no experience with it. I don't fool around with solid state...
-
drteming replied to the thread Little Dot Mk II Rebuild.There are 2 different 6.3V windings in the transformer, but they supply the EF95 and the 6N6P separately, so the left and right channels...
-
drteming replied to the thread Little Dot Mk II Rebuild.Try swapping tubes between the channels. First do the EF95 and then the 6N6P. Other than the tubes and the volume pot, there shouldn't...
-
drteming replied to the thread Little Dot Mk II Rebuild.I used a 100k SMD stepped attenuator. Search "DACT stepped attenuator" on e--y. I think the original value is 10k.
-
drteming replied to the thread Little Dot Mk II Rebuild.I built this for my kid in college. I trust him not to do anything stupid, but not his friends, who may plug who knows what into the...
-
drteming replied to the thread Little Dot Mk II Rebuild.With a total current draw of about 36mA, I'm not sure how much benefit a beefier power supply will provide. But just for fun, I ran it...
-
-
drteming replied to the thread Little Dot Mk II Rebuild.Word of warning:. Even though this is a little amp, there are some lethal voltages, especially with the trio of the 330uF caps. Make...
-
drteming replied to the thread Little Dot Mk II Rebuild.It was definitely for fun. I didn't have the original to do a direct comparison. I can't go by memory, because it has been a few years...
-
-
Loading…
-
Loading…
-
Loading…
-
Loading…
-
Loading…
