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1: Inmate Systems, H713's Main (0.00)
Posted by H713 on 2018-07-24, 18:23:45 (108.69.64.156)
H713 's Main System
IP Address: 108.69.64.156
Last Update: July 24, 2018 at 18:23:45
Amplifier: Heathkit AA-121, Electro-Harmonix EL34. 40 WPC
Preamplifier (or None if Integrated): DIY .......
2: Tube DIY Asylum, RE: Yet Another "Sub-project" (0.00)
Posted by H713 on 2018-07-22, 22:42:58 (108.69.64.156)
Access to a lathe (and a mill, for that matter) is so awesome, it'll change your life. .......
3: Tube DIY Asylum, RE: Speaker Impedance Selector (0.00)
Posted by H713 on 2018-07-22, 22:39:35 (108.69.64.156)
I just install 3 binding posts/banana jacks per channel: Common, 4 and 8 ohms. 16 ohm speakers are uncommon enough (okay, at least in my world) that switching a lead inside is no big deal. I'm wary a .......
4: Tube DIY Asylum, RE: Thanks Dennis for your reply ..... (0.00)
Posted by H713 on 2018-07-22, 22:29:27 (108.69.64.156)
Well Electra-Print still winds output trannies with silver secondaries... .......
5: Tube DIY Asylum, RE: Preamp done but.... (0.00)
Posted by H713 on 2018-07-22, 22:27:24 (108.69.64.156)
Wouldn't that cause the output impedance to change as you adjust the volume, or am I thinking about a different configuration? .......
6: Tube DIY Asylum, RE: Preamp done but.... (0.00)
Posted by H713 on 2018-07-22, 22:22:02 (108.69.64.156)
I made this mistake too. I bought a crappy $8 "alps" RH27 (NOT RK27). A chinese knock-off that is actually a stepped attenuator, and it's terrible. WAY too coarse. IMO, stepped attenuators aren't my .......
7: Tube DIY Asylum, RE: Pentode - 440V - $150 (0.00)
Posted by H713 on 2018-07-22, 19:26:35 (108.69.64.156)
If I buy the Hammond, I'll be sure to compare them to my Edcor CXPP60-6.6K. They're going to use different tubes in a different amp, but I should be able to find some data. The lack of a comparison be .......
8: Tube DIY Asylum, RE: Pentode - 440V - $150 (0.00)
Posted by H713 on 2018-07-22, 17:07:32 (108.69.64.156)
Thanks. How does Hammond compare to a custom transformer from Electra-Print ($200 each)? .......
9: Tube DIY Asylum, RE: Anyone used Heyboer's Fisher 500C OPT Replica? (0.00)
Posted by H713 on 2018-07-22, 08:33:34 (108.69.64.156)
Yeah... but they're $500 a pair, and for $100 less I could get a pair of Electra-Print transformers. Like I said, I'd greatly prefer to keep the cost of these transformers under or around $150 each ($ .......
10: Tube DIY Asylum, RE: Anyone used Heyboer's Fisher 500C OPT Replica? (0.00)
Posted by H713 on 2018-07-21, 18:07:23 (108.69.64.156)
I was actually planning to run Pentode mode with regulated screens, and yes, I did plan to use NFB but a good transformer makes implementing that easier. The lack of UL taps on the fisher transformer .......
11: Tube DIY Asylum, RE: Anyone used Heyboer's Fisher 500C OPT Replica? (0.00)
Posted by H713 on 2018-07-21, 18:03:38 (108.69.64.156)
I asked about the S-265Q, but they quoted $250 per transformer. .......
12: Tube DIY Asylum, RE: Anyone used Heyboer's Fisher 500C OPT Replica? (0.00)
Posted by H713 on 2018-07-21, 16:47:07 (108.69.64.156)
What would you suggest using for a PP 807? I'm not worried about dimensions. What are the specs on the two different versions? Usually I just design around transformers that I find, but I wanted to us .......
13: Tube DIY Asylum, RE: Anyone used Heyboer's Fisher 500C OPT Replica? (0.00)
Posted by H713 on 2018-07-21, 16:32:22 (108.69.64.156)
Yes, but only in the last week or so. For several weeks before that I heard nothing in reply to my email and two phone calls. I assume it was just an extended vacation (or just busy!). They said 4-5 w .......
14: Tube DIY Asylum, Anyone used Heyboer's Fisher 500C OPT Replica? (0.00)
Posted by H713 on 2018-07-20, 22:01:02 (108.69.64.156)
Hey Y'all, I was wondering if anyone has tried Heyboer's Fisher 500C replica transformers. I was planning to use them for a Push-Pull 807 build with a plate voltage of around 440V. If anyone here has .......
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