john_tracy
Responses from john_tracy
| Tube Test Results There are two numbers because there are two tubes (triodes) per 6SN7. As to an earlier question of yours, the filiment usually does not burn out like a light bulb. What happens is the cathode coating slowly gets "poisoned" due to impurities at the... | |
| Are there any budget tubed preamps that stand out Dave Davenport's line stage kits available through K&K Audio. Transformer coupled front and back with Lundahl amorphous core transformers; differential parafeed topology; very linear operation of the dual triode by using MOSFET CCS for plate l... | |
| Phono amp recommendations If you go the K&K route, do yourself a favor and buy a pair of Herbies Tube Dampers. They really do take the sound up another notch. It also benifits fram frequent frequency sweeps using the Cardas set-up record. | |
| tube question The 'W' in WGTA indicates it's a ruggedized military version. | |
| Shelter 90X Tracking Force I have a rather large digital top-loader that I made a $0.50 "tool" to work with it. I got the idea from looking at the Wally Tool version. It's just a strip of plastic (retrived from the waste at local hardware store's window glazing station) tha... | |
| Shelter 90X Tracking Force My 2 cents. The Shelter's VTF requirment, like most cartridges, is temperature dependent. My 90X is mounted in an OL Illustrious arm and for ambient temps in the range of 68-70f I track at 1.99g. Higher temps require less tracking force. I use a t... | |
| Surge in Electric Bill I would guess that at most the Cary is drawing 2 amps. 2 hours per day translates to 0.5KwH/day times 30 days is ~ 15KwH/month. I don't know what your paying; but $0.25/KwH is a reasonable estimate so we're looking at about $4/month as an upper bo... | |
| how do i make a 50V power supply? I assume that you want 50VDC? How much current needs to be supplied? Does the voltage need to be regulated? Will the current demand be constant or will it vary? What about sonics? Poor choices made in designing a PS can destroy the sonics of the g... | |
| replacing vintage amp speaker out puts For my Eico HF-89 I used the Cardas posts. They fit in the rectangular opening with a small space on one side. I made a small adapter plate to fill that space and used it to mount a switch so I can choose either the 4 or 8 ohm tap. It looks neat a... | |
| tube amps with El 34s your favorites ?? Eico HF-89 - although I am currently running my modded version with TS 6550s in triode mode. It did sound very good with the Mullard xf2s that came with the amp; but alas one of them gave up the ghost after one week of use and the EH EL34s that I ... | |
| Vacuum tube tester repair There was a woman who advertised in VTV magazine that repaired Hickock tube testors. You could email Charlie Kittleson the publisher; I'm sure he could put you in touch with her. I think her name was Sue Chaffee or something like that. triode@vacu... | |
| Anyone using the Clear Audio Virtuoso Wood? Biomimetic - I'm using the K&K phono pre available from K&K Audio as a kit. The version Art Audio sells, the Vinyl Reference, was recently reveiwed by M. Fremer. Kevin also sells Dave Davenport's excellent line stage kit. I have both and i... | |
| Anyone using the Clear Audio Virtuoso Wood? Jeff, I expect your experience may be due to a loading problem. Excess capacitance loading will result in high freq. ringing with this cart.(and most other MM). Mine sounded shrill also; until I dropped all extra cap. (only the cap. of the cables ... | |
| Matching tubes Blown B+ fuse or fried cathode resistor if no fuse in circuit. BTW, there is matching and there is matching. I would recommend matching plate current under "realistic" conditions; ie, B+ and neg. bias similar to your amp. Guys on ebay who use a tu... | |
| Balanced power compatabilty census Neil, had the 3 wire PC conversion done so I could use a better power cord. I had that mod done by the tech who serviced and aligned the Fisher. Can't be too hard; I wired my Eico that way. The two "hots" to the power transformer and the ground to... |