Unusual Transformer
Moderators: pompeiisneaks, Colossal
Re: Unusual Transformer
Actually I am just going to copy the 160PS power amp. I should have plenty of current to drive a pair of 6550's.
Dredging Up the Past
I am wondering if someone can help me model the HP23A power supply in duncans tool. I have tried a few times with no luck.
Re: Unusual Transformer
As I recall, PSU uses the DCR of the windings as part of the modeling. Can you post primary DCR and DCR of each of the secondaries? I'm thinking you can model one secondary at a time, not both at the same time in PSU. The middle secondary (yellow-brown/yellow-blue) has forked choice so that means we'll need to treat that as two separate models. Remember to get DCR for the 95V winding and the 125V winding. If you are only looking to use the 268V winding, please say so as it will save a lot of work.
I'm willing to give it a try, but my experience with it is limited and I'm not sure if I can get it to work.
Edit: I looked at Duncan's PSU and I don't believe it will be able to replicate the HP23 design. Either that or I don't know how.
In any case, I made some rough estimates and they are consistent with the spec sheet. So, you'll get your 700V @ 250mA for the PS160. You'll have to decide if 250mA is enough. I'm not exactly clear what you intend for power tubes as there is some waffling in the thread.
Without the doubler, I think you'll get about 500V @ 500mA on the high voltage secondary. That ought to be more than enough for a quad of whatever you have in mind.
I'm willing to give it a try, but my experience with it is limited and I'm not sure if I can get it to work.
Edit: I looked at Duncan's PSU and I don't believe it will be able to replicate the HP23 design. Either that or I don't know how.
In any case, I made some rough estimates and they are consistent with the spec sheet. So, you'll get your 700V @ 250mA for the PS160. You'll have to decide if 250mA is enough. I'm not exactly clear what you intend for power tubes as there is some waffling in the thread.
Without the doubler, I think you'll get about 500V @ 500mA on the high voltage secondary. That ought to be more than enough for a quad of whatever you have in mind.
Re: Unusual Transformer
So after a lot of thought I have decided use the transformer for its intended purpose, powering a pair of large transmitting tubes. I found a couple of nice schematics for audio amps with 807's and 6146 tubes. Additionally, from the research i've done the PT should be more than stout enough for this service.
Does any one have any thoughts on either of these tubes?
Does any one have any thoughts on either of these tubes?
Re: Unusual Transformer
807 is pretty much the same as 6L6, but it has the top cap. If it were me, I'd go with 6L6's and skip the extra work for the top cap. YMMV.
-
Kagliostro
- Posts: 535
- Joined: Wed Dec 30, 2009 12:09 am
- Location: Italy
Re: Unusual Transformer
Top cap is there to prevent arching on the socket when high B+ voltage are used
I've a small stockpile of 1625 military tubes that are a 12.6v heater version of the 807 tube (but with different socket)
If you like the idea of the 807 I think you'll not be disappointed, I don't know at which price you can get the 807 and the 6L6
but if the amp is a budget amp I'll consider the lower priced tubes
Oh, I see you have a 12.6v winding, so ..... give a look if you are able to find 1625 tubes and UX7 socket on the cheap
K
I've a small stockpile of 1625 military tubes that are a 12.6v heater version of the 807 tube (but with different socket)
If you like the idea of the 807 I think you'll not be disappointed, I don't know at which price you can get the 807 and the 6L6
but if the amp is a budget amp I'll consider the lower priced tubes
Oh, I see you have a 12.6v winding, so ..... give a look if you are able to find 1625 tubes and UX7 socket on the cheap
K