Tube Amp Archive

interesting thread, as I have a pair of Altec ER-12 speakers stashed away I should do something with. The T/S params are a little different than EV12L, but it is a similar cast-frame heavy duty speaker. Altec ER-12 TS params.jpg The Xmax value showes the fisical ability of the speaker to push air b...

14lts for the cabinet volume won t even be big enough for the speaker only. That page's "result" presentation is somewhat misleading. One needs to dimension HxWxL of the outside of cabinet with the computed volume plus the space for the speaker, the full volume of the port plus all of the materials...

14lts for the cabinet volume won t even be big enough for the speaker only. I don t remember why it gave me a 80 liters box the first time i used the program, probably i mistyped some of the evm12l values. Anyway, i don t know about the oval open back, thank you for the suggestion, i will take a loo...

It looks like it doesn't matter with this online program, it does not change the cabinet volume according to the vents parameters. That is why i was unconvinced in the first place. A guy in another forum posted some result using my speaker specifications, he s using Winlsd on window. 55 liters for t...

Opinions?

Another program, same huge cabinet volume result.

Hello, yes, the program gives you parameters for open, closed and ported cabinets.
About the vents, you can only chose the diameter, so it is for pipe vented cabinets.
The result is the drawing i previously posted, 4 inches diameter.

I know, with the vent cover on, the cabinet is tuned around 55hz, without it is tuned around 70hz. One thing i don t really understand. When i do the calculation according to my speaker specifications, the cabinet volume suggested by the program is almost three times bigger than the tl806, 127 liter...

It is a one time project, i m not going to buy a dedicated program for that. I will build the cabinet according to the cabinet volume suggested by the free program and adjust the vent on the going. I don t need to tune the cabinet to 50hz, the speaker doesn t go that low. The tl806 cab is tuned arou...

Yes, exactly, how can i calculate the size of the shelf port?
The diameter of the vent is 4 inches in the drawing.

I did, i also found an online calculator, and here is the result IMG_1008.png I understand i can now come out with the measures of the cabinet to match the volume. What i don t understand is the vent, in the result it is shown as a sort of pipe, while on the tl806 there are three chambers underneath...

Hello, I want to build a 1x12 cab for my jensen jet tornado 100, i d like to use the tl806 plan but i know that a ported cab must be carefully planned. There is a program to calculate the cabinet volume and vent area, this one http://www.linearteam.org/ I don t have a pc and i was wondering if any o...

Wow, you guys really gave me some to read.
Thank you
My first goal is to understand how much juice it has, i mean, milliamps and then the secondary winding volts, is it a 270, a 300 or even more.
The secondary does not have a 5 volts out that is for sure and no center taps too.

Hi guys, i have an old power transformer there are no informations about it, no manufacture or labels or anything, all i know is that i comes from a little amp, probably a champ clone or something like that. Could you help me understand how to check it by using a multimeter? I d like to use it or ma...

Great i ll check the vht then. Rignt now the amp sound is good, both clean and crunch, i rarely push it even more so i don t think i am going to change anything, maybe the grid stopper on the power tube and the v1b bypass cap value with this one being the hardest choice, since i dont like having a s...