6G6 b+ voltage & 5881 tubes

[scooter_trasher]

Electrolytic for sure, I think of them as bias caps , or cathode bypass caps when cathode biased, like the preamp tubes , all caps could be considered filters that's what they do, even in the tone stack, I think of the power filter caps as the filter caps

[tubeswell]

Well technically the job they are doing in the bias supply is filtering and smoothing the bias voltage after its been rectified - same as the filter caps do for the HT supply.

[scooter_trasher]

Your confusing me with your terms,( B+ =HT ?), the 6,000 to 12,000v supply line that runs through my backyard before the step-down transformer isn't considered high tension around here,just post substation supply line, this is what WE call High Tension 138kv to 780kv

[ToneMerc]

Your confusing me with your terms,( B+ =HT ?), the 6,000 to 12,000v supply line that runs through my backyard before the step-down transformer isn't considered high tension around here,just post substation supply line, this is what WE call High Tension 138kv to 780kv

In the context of low voltage transformers a step up transformer will have a LT (low tension) or low voltage side and a HT ( high tension) or high voltage side aka primary/secondary windings. The majority of power transformers that I use are custom wound and I always reference my desired HT winding (secondary) current when placing an order.

Thus, when I see "HT voltage" I always look at the rectified DC voltage on the secondary side of the power supply.

TM

[Stevem]

These terms ( B+, B- , HT) are very old terms from the Dawn of electronics, so much so that B was in reference to the battery's they had to use to get a DC voltage !
HT back then was a term used for a minesule 250 volts or so.
These days we need a full replacement of using the term B+ And B- with V+ And V-.

[pompeiisneaks]

I tend to like the nomenclature of just naming each node in the power supply as A, B, C, D, E etc. Then you know the expected voltage at that point (if referenced) and where it is tied into the anodes along the line. But yes, it is weird legacy stuff.

~Phil

[scooter_trasher]

Took me long enough to get used to calling the mains B+, don't know how long it will take to think of nodes as , a b c d, instead 1st 2nd 3rd 4th
https://youtu.be/JhaY9oDNvdk

[JazzGuitarGimp]

Took me long enough to get used to calling the mains B+, don't know how long it will take to think of nodes as , a b c d, instead 1st 2nd 3rd 4th
https://youtu.be/JhaY9oDNvdk

And now you are confusing me When I hear "mains", I think of the AC voltage at the wall socket, not a high voltage DC source.

[scooter_trasher]

That's why I call them wall voltage , and B+

[martin manning]

I believe "LT" and "HT" are typically used in Britain for the filament and plate supplies, and "mains" refers to what is called "wall" or more formally "line" voltage in the US. Also, "Plate" is used in the US, where "anode" is typical in Europe. We've been over this before, but A, B, and C were the names of the batteries used in the early days of vacuum tube radio for the filament, plate, and bias supplies. B has persisted as the term for the plate supply, and note that single-cell 1.5V dry batteries are still called A (and AA, and AAA), and C, but not B.

[scooter_trasher]

Took me long enough to get used to calling the mains B+, don't know how long it will take to think of nodes as , a b c d, instead 1st 2nd 3rd 4th
https://youtu.be/JhaY9oDNvdk

And now you are confusing me When I hear "mains", I think of the AC voltage at the wall socket, not a high voltage DC source.

Here in Michigan , where Edison is from Mains in a house circuit is the drop that goes into the breaker box and disengaged by pulling the "main breaker"

[Stevem]

You missed my point, theses days it should be termed V+ And V- unless we are taking about a stomp box run on battery .

[martin manning]

Here in Michigan , where Edison is from...

Thomas Edison? He was born in [edit] Milan (not Marion) OH.

You missed my point, theses days it should be termed V+ And V- unless we are taking about a stomp box run on battery.

V+ and V- is typical for bipolar power supplies used with modern IC's. Those circuits may also have a separate bias voltage. Vacuum tube technology has its own nomenclature; nothing wrong with that, IMO.

[scooter_trasher]

OK "Thomas Edison was born in Milan, Ohio, and grew up in Port Huron, Michigan."

[68strat]

*coughs uh hum Tesla