Announcement
Collapse
No announcement yet.
Search Result
Collapse
472 results in 0.0196 seconds.
Keywords
Members
Tags
-
Many amps designed for KT88s also have slots in the chassis between tubes to allow for cooling air to circulate. They do run hot when used at 70% dissipation....
- Likes 2
-
The cathode resistors will also help even out the current sharing between the tubes if they're not well matched.
Genalex had specific cooling...
- Likes 2
Leave a comment:
-
HIWATT amps used typical 1k/5w screen resistors on the 50 watt amps, but an odd arrangement for the 100 watt ones. There was a shared 470/10w screen resistor...
- Likes 1
Leave a comment:
-
Many moons ago I was had occasion to use an early solid state Vox 2x12 combo, and that would get really "squishy" when you cranked it....
Leave a comment:
-
I was speaking of input versus output results, not input requirements. If you apply power to a CG amp input, you get voltage gain but not current gain. It...
Leave a comment:
-
> 700v
I've never seen design max specs for a common grid power tube configuration. Common grid config is primarily a voltage amplifier (as opposed...
Leave a comment:
-
Thanks for the suggestions. I'm just afraid fiddling around with the broken end will cause problems with the other end! I'll give it a shot.
Leave a comment:
-
Fender Ribbon Cables
I'm working on a Fender Blues Deluxe Reissue. (reissue? really?) Anyway, some of the wires of one of the ribbon cables that connect the main board to the...
-
The three series bias resistors should be 47k (pot end), 15k, and 120k for 6650 tubes
Leave a comment:
-
Yep, power limiting for the HF driver(s). When these bulbs pass enough current to light up, their resistance goes way up.
- Likes 1
Leave a comment:
-
Agreed, the described screen connection makes no sense. Are you sure pin 9 is not connected at all on two tubes?
Leave a comment:
-
You can also use something like a MAX 1771 boost converter and small inductor (330uH) to produce 200v in a very small form factor. (Unfortunately, the 1771...
Leave a comment:
-
I wonder if you can vary the Q as well. This could be generalized to be useful in, say, Ampeg-style mid circuits (instead of the expen$ive inductor).
- Likes 1
Leave a comment:
-
Different LEDs will drop different nominal voltages, grouped by color. Did the original/clear LED emit white or another color? (This for anyone familiar with...
Leave a comment:
-
I like the idea, but it'll have the same power dissipation issues as the VVR-type reducers. It may say "15 amps" but it still has to dissipate "amps...
Leave a comment:
-
Some other food for thought:
Even 470 ohms must be dropping some voltage, unless Ohm's law has been repealed. It's usually small, though,...
Leave a comment:
-
With a split load you have an additional R in the signal path, which combined with the input capacitance of the following stage will reduce the ultra-HF a...
- Likes 1
Leave a comment:
-
Merlin Blencowe has a good discussion of grid stoppers in his book "Designing Tube Preamps for Guitar and Bass" (an abbreviated version is at h...
- Likes 3
Leave a comment:
-
Leave a comment: