Perfect specs for 36W PT/OT?
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- Cknopp
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Perfect specs for 36W PT/OT?
I have the preferred specs for the 18watt, but I am looking for the specs needed for a 36W unit. I am looking to get a layout of the mains, secondary, filament, OHMs and so on for the PT and OT transformers
As always, I greatly appreciate any education that is intelligently offered!
THANKS!
Chris
As always, I greatly appreciate any education that is intelligently offered!
THANKS!
Chris
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- Cknopp
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I don't doubt it, but I am about to place an order for the 18 watt toroid transformer sets, and I can add the 36 watt trannies and get free shipping.
Can anyone direct me to the information?
I found this for the PT:
290-0-290@200mA
6.3v@6A
5v@3A
Is this what is best for the 36watt PT?
Still looking for the specs on the OT, so any help is appreciated!
Can anyone direct me to the information?
I found this for the PT:
290-0-290@200mA
6.3v@6A
5v@3A
Is this what is best for the 36watt PT?
Still looking for the specs on the OT, so any help is appreciated!
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- Cknopp
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Thanks!
To be honest, I actually figured that out earlier today...
Once I realized that the only real difference on the output over the 18watt is that it has the tubes in paralell, thus halving the Ohms, I realized that the 8kOhm 18watt tranny had to be dropped to 4kOhm.
I do appreciate your response as well!
Thank you!
To be honest, I actually figured that out earlier today...
Once I realized that the only real difference on the output over the 18watt is that it has the tubes in paralell, thus halving the Ohms, I realized that the 8kOhm 18watt tranny had to be dropped to 4kOhm.
I do appreciate your response as well!
Thank you!
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- menger
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- Cknopp
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Maybe I am being unclear here?menger wrote:I'd email graydon @ gds right away hes having a deal on iron i just copped a 36watt set yesterday and the deal can't be beat and its some sweet iron the only difference in the iron is opt 4k and the pts more like 200 250 ma and you get optian for a octal recto FOR REAL EMAIL HIM ASAP mark
I have no interest in purchasing these transformers to build my own amps. I just am interested in what changes need to be made in comparison to an 18watt transformer.
I am placing the order for the 18 watt transformers soon, so I want to add some 36 watt PT/OT as well to combine the shipping.
I appreciate Graydon's transformers for what they are, but mine are toroid, so not even close to the same thing, other than output.
If the 18 watt is:
290-0-290 @ 300mA
3.15-0-3.15 @ 2A
0-5-6.3 @ 3A
What has to change for a 36 watt version?
Thanks!
Chris
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- Shrapnel
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Since your toroid already delivers up to 300mA, you are already covered. IIRC, a standard 18Watt is 100-120mA, and most 36Watt PTs are only about 200mA.Cknopp wrote: I appreciate Graydon's transformers for what they are, but mine are toroid, so not even close to the same thing, other than output.
If the 18 watt is:
290-0-290 @ 300mA
3.15-0-3.15 @ 2A
0-5-6.3 @ 3A
What has to change for a 36 watt version?
Thanks!
Chris
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Rock and Roll Aint Noise Pollution, neither is my amp
- skilpadda
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Would not that 3.15-0-3.15@2A heater winding be too small even for an 18watt
Preamp 3 12ax7 @0.3A (0.3*3) 0.9A
Poweramp 2 EL84 @0.75A (0.75*2) 1.5A
So an 18watt would need about 2.5A
And a 36watt an additional 1.5A for a total of 4A
Otherwise the transformer would do well for both.
This is from the top of my head so please correct me if I am wrong.
Preamp 3 12ax7 @0.3A (0.3*3) 0.9A
Poweramp 2 EL84 @0.75A (0.75*2) 1.5A
So an 18watt would need about 2.5A
And a 36watt an additional 1.5A for a total of 4A
Otherwise the transformer would do well for both.
This is from the top of my head so please correct me if I am wrong.
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- Cknopp
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