Do It Yourself (DIY) paradise for tube and SET project builders.
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Well all the parts finally got here......
40.136.250.222 |
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Posted on December 2, 2016 at 15:14:05 | ||
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
The holiday must have messed up the mail 'cause everything was several days later than estimated by the sellers. Anyway, I got the two solid state switcher units units (these are only 3 amps and are for the 26 tubes). Also got the halogen light transformers, the ones that will give me 12 volts of AC. Spent most of the afternoon installing one of the small switchers on the right channel and tracing down some grounding issues I had in that side as well. When I finished I had music coming out the other end and the same operating points as the bread board I did with the conventional transformers for filament voltages. Not sure about the sound yet, I tend to think I liked the other better, but I have not done any tweaking yet. The next thing I will do is install the halogen transformers on the two 813's of the left channel and then do a shoot out between it and the right channel. The winner stays and the loser gets replaced by the original version with the filament transformer for the 26. Which ever one of those wins gets built into the final amp. Should be interesting and will definitely keep me busy for a while. Ray P, I will start going through one of the halogen transformers tomorrow and try to follow the instructions you put in the post. Most likely I will be hollering for help before long ..... |
RE: diodes, posted on December 3, 2016 at 08:30:17 | |
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
Great photos! Thanks! |
RE: thermistor, posted on December 3, 2016 at 10:18:22 | |
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
Roger on that. It's the most fun too! |
RE: a warning, posted on December 3, 2016 at 12:03:33 | |
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
That explains it, but see my new post above. I am still floundering. Thanks. |
One puppy per tube, posted on December 3, 2016 at 16:15:00 | |
Posts: 726
Location: Maryland Joined: June 30, 2005 |
I suspect you find find it simpler to have each 813 have its own supply. ray |
RE: One puppy per tube, posted on December 3, 2016 at 17:15:27 | |
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
Me too. |
square wave rms is not calculated like sine, posted on December 3, 2016 at 17:24:10 | |
Posts: 3485
Joined: August 20, 2004 |
right? |
RE: ok, what is happening here????, posted on December 3, 2016 at 17:57:11 | |
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
Well that is closer at least. |
RE: pull some windings off the smaller choke and, posted on December 4, 2016 at 10:36:15 | |
Posts: 1067
Location: Florida Joined: October 17, 2003 |
You should raise the output freq |
RE: One more thing..., posted on December 4, 2016 at 18:25:44 | |
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
I thought I had. How do I confirm the frequency? |
RE: The lower wattage have toroidal , posted on December 4, 2016 at 18:35:14 | |
Posts: 1067
Location: Florida Joined: October 17, 2003 |
I have the 60 and 80w units |
RE: One more thing..., posted on December 4, 2016 at 18:39:29 | |
Posts: 10012
Location: Central Texas Joined: September 24, 2006 |
Sorry, I was just asking you to check it one more time for me. |
RE: infrared thermometer, posted on December 4, 2016 at 18:41:57 | |
Posts: 726
Location: Maryland Joined: June 30, 2005 |
Good idea. ray |
RE: update , posted on December 5, 2016 at 04:03:11 | |
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
Tell me how to set it up and I will take and post a picture. |
RE: update , posted on December 5, 2016 at 06:57:16 | |
Posts: 4481
Location: North Carolina Joined: September 28, 2013 |
I will see if I can do this. |
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