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About Heifetz

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  1. Hello, I checked the biasing on my power amplifier two nights ago using compubias. The amp has 4 EL34's and are recommended to be biased at 12W -18W which is 50%-70%. Left tubes where at 13w and 14w and the right tubes 12w and 13.5w. I decided to adjust them to 14.7w per tube which I managed to do. I noticed an improvement. Last night I checked the bias again and whilst the left tubes seem to be quite steady at 14.5w the right tubes are reading at 13w and 13.5w. My question: Can anyone help me by explaining why the reading is now different. Should I try re-biasing the right tubes again? Why are there fluctuations? Thx so much, Bob
  2. It depends how tall you sit and the height of the chair anyhow. I have the Gaia 3's under my subs and main speakers. I noticed a big improvement in bass and dynamics - really what their ad said it would do. The 'springs' resonate at an extreme low frequency so as not to be heard by the human ear. They are supposed be capable of tiny wobble from front to back and vice versa and in that horizontal plane i.e. same direction that the speaker cone moves - front/back direction Bob
  3. Why stop at just two?
  4. Hi Kenny, Yes, it is a bit of a 'hot bed'. Does the performance speak 'truth' to me? Am I engaged emotionally and intellectually? For me, the answer was 'yes'. I do enjoy the sound of 'period' instruments too. I don't think anyone will know for sure who has truly got back to the roots. One must remember that performances in the 18th and 19th centuries where probably more unique and individual than today. In those days there were no recordings to influence a 'sameness'. So I think the instruments themselves are reproduced exceptionally well (many are still existing) so no problem there. The interpretive and stylistic components are not really set 'in law' but rather in a set of principles.
  5. Ever since I got into vinyl and hifi I have been pretty 'baroque'. I do love Baroque and have many vinyl records of Handel, Bach, Scarlatti, Torelli, Corelli, Vivaldi and so on. But I enjoy the most is the 'historically informed' performances - of which there are not many on vinyl. My best 'historically informed' performance on vinyl is the 2006 Dunedin Consort of Handel's Messiah. It is superb. It is such a refreshing performance that makes you feel that its the first time you have ever listened to the work. Excellent production and engineering with a masterful performance. I got my copy two years ago after a global hunt that took 4 months. If you are really interested in this performance and historically informed approach then I urge you to click on this link for a 3 min video presentation of their Mozart Requiem that explains their interpretation and approach. www.youtube.com/watch?v=qowrRNQY5bw
  6. @VanArn @Sir Triode Thank you. I would like to bias the amp. Its not been done for about two years and it concerns me a little. I'm looking at buying a bias meter such compu-bias meter http://www.compu-bias.com as I thought it a little safer than the multi-meter. I saw an Aussie product 'Evatco bias meter' but don't think its available anymore. May be another is better - I'm not sure yet. So I'm just gathering information. Bob
  7. Thx Martin, I hope you are well. I've been googling so much and never found that page before. How d'you do that so quickly Thx so much, Bob
  8. i, This is my amp (pic below). But I don't know if its an ClassA or Class AB. How do I tell if its one or the other? Its a TSLIM Diva BlueSky. Its impossible to get a response from Singapore and haven't received on from Audio Salon. Your help would much appreciated. Thx so much, Bob
  9. @vinilink I lived in Matsumoto many years ago - actually studied there. That was before I became a lover of vinyl. Bob
  10. Item: Fozgometer Location: Burwood East, Melbourne East Price: $290 Item Condition: As New in Original Box - used a few times only Reason for selling: funds for other equipt. Payment Method: Pickup or by mail - Paypal Extra Info: I have the test tones on a CD which will be sent alongside the Fozgometer - or you can download them. The FOZGOMETER represents a breakthrough for adjusting phono system azimuth. To obtain high performance from a modern phonograph system, the tonearm and pickup cartridge must be properly adjusted to within a few thousands of an inch. There are several alignment gauges available to adjust overhang and offset. To adjust cartridge azimuth (Axial Tilt), it has been necessary to use lab quality equipment and a test record. Azimuth may be adjusted using an oscilloscope, AC voltmeter, or computer program. These methods can be expensive and time consuming. The FOZGOMETER represents a breakthrough for adjusting phono system azimuth. The FOZGOMETER incorporates a "Log Ratio Detector" developed for surround processor steering logic circuits to measure channel separation over a wide range of signal levels down to -70 dB. The readings are virtually independent of overall signal levels, and can be made with a wide range of input signals without effecting accuracy. The Fozgometer is a small portable battery powered unit that is used in conjunction with a test record. It measures channel separation, channel balance, and signal direction quickly and accurately. Readings are taken without touching the meter, leaving your hands free to work with the tonearm. The meter reads channel separation in both directions, and channel balance. The LED's indicate Left, Center, and Right signal (test tone) positions. *Note: A Test LP is required. If you don't have one please view the HiFi News Test Record.Stereophile Recommended Component and TAS Recommended Component Pictures:
  11. very nice. Oh, where is the bridge on your Strad? Bob
  12. Hi Martin, I hope you are well. That's a good suggestion. My friend biased it for me previously (he is now passed away) and I remember that the chassis needed to be opened and there are a series of small screws that need to be turned and adjusted. He used a multimeter. It looked slightly complicated to me at the time and now I'm thinking that one of these devices may be more straight forward. I call Audio Salon. Thx Martin. Bob
  13. Hi, Recently I've been thinking its about time I checked the biasing of my EL34 tubes on my amplifier. There seems to be a few devices on the market that make it look quite straight forward. Does anyone have a recommendation? Also, if I buy one, would someone experienced and knowledgeable be willing to show me how to use it? Is there anywhere in Melbourne I might buy one of these devices like a Bias King http://biasking.com/index.html or a Tad Bias Master http://www.tubeampdoctor.com/en/shop_TAD_Equipment_TAD_BiasMaster/ Than you for any comments., Bob
  14. Oh, I had some braiding that I tried on my interconnects last night and I think the sound is worse. Less 'alive' and not as dynamic. The braiding was some 'plastic' audio braiding. I also have some cotton sleeve type braid. I'll try that on the weekend. Bob
  15. Hi, 'Spray on shielding' ? I have a little hum from my system and thought the cause were my interconnects as I thought they were unshielded. It turns out that the hum is from my preamp power unit (powering my preamp) and then I remembered that I had bought the interconnects from my friend (who has since passed away) and he said that those particular interconnects required no further 'shielding' because they had been treated/sprayed with something that created a 'shielding'; Does anyone have any knowledge about what that may be ? Bob