6G6 b+ voltage & 5881 tubes

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scooter_trasher
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Re: 6G6 b+ voltage & 5881 tubes

Post by scooter_trasher » Tue Jun 13, 2017 8:01 pm

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
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Re: 6G6 b+ voltage & 5881 tubes

Post by tubeswell » Wed Jun 14, 2017 9:35 am

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.
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scooter_trasher
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Re: 6G6 b+ voltage & 5881 tubes

Post by scooter_trasher » Fri Jun 16, 2017 1:14 am

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
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Re: 6G6 b+ voltage & 5881 tubes

Post by ToneMerc » Fri Jun 16, 2017 9:21 am

scooter_trasher wrote:
Fri Jun 16, 2017 1:14 am
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

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Re: 6G6 b+ voltage & 5881 tubes

Post by Stevem » Fri Jun 16, 2017 10:49 am

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-.
Most times with good Amps just like it is with sex, it's best to just plug straight in!

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Re: 6G6 b+ voltage & 5881 tubes

Post by pompeiisneaks » Fri Jun 16, 2017 5:50 pm

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.

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scooter_trasher
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Re: 6G6 b+ voltage & 5881 tubes

Post by scooter_trasher » Fri Jun 16, 2017 6:30 pm

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

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Re: 6G6 b+ voltage & 5881 tubes

Post by JazzGuitarGimp » Sat Jun 17, 2017 5:02 am

scooter_trasher wrote:
Fri Jun 16, 2017 6:30 pm
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.
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scooter_trasher
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Re: 6G6 b+ voltage & 5881 tubes

Post by scooter_trasher » Sat Jun 17, 2017 5:22 am

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

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martin manning
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Re: 6G6 b+ voltage & 5881 tubes

Post by martin manning » Sat Jun 17, 2017 10:38 am

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.

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Re: 6G6 b+ voltage & 5881 tubes

Post by scooter_trasher » Sat Jun 17, 2017 8:11 pm

JazzGuitarGimp wrote:
Sat Jun 17, 2017 5:02 am
scooter_trasher wrote:
Fri Jun 16, 2017 6:30 pm
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"

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Re: 6G6 b+ voltage & 5881 tubes

Post by Stevem » Sun Jun 18, 2017 10:30 am

You missed my point, theses days it should be termed V+ And V- unless we are taking about a stomp box run on battery .
Most times with good Amps just like it is with sex, it's best to just plug straight in!

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martin manning
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Re: 6G6 b+ voltage & 5881 tubes

Post by martin manning » Sun Jun 18, 2017 3:41 pm

scooter_trasher wrote:
Sat Jun 17, 2017 8:11 pm
Here in Michigan , where Edison is from...
Thomas Edison? He was born in [edit] Milan (not Marion) OH.
Stevem wrote:
Sun Jun 18, 2017 10:30 am
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.
Last edited by martin manning on Sun Jun 18, 2017 7:16 pm, edited 1 time in total.

scooter_trasher
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Re: 6G6 b+ voltage & 5881 tubes

Post by scooter_trasher » Sun Jun 18, 2017 5:35 pm

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

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Re: 6G6 b+ voltage & 5881 tubes

Post by 68strat » Tue Jun 20, 2017 5:43 am

*coughs uh hum Tesla

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