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tube fanatic

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  1. Before you consider other amps I need to ask some questions. Have you tried both impedance taps? In some systems one tap can provide a very different sound from the other. With a different amp is the sound radically different? And, does the LM-34 sound well with different speakers? Another option to try, which is not costly, is to try swamping resistors to smooth out the speaker impedance variations: https://www.zuaudio.com/diy/loading25r Maynard
  2. The forum has a section devoted exclusively to the use of tube electronics (Talkin’ Tubes) with Klipsch speakers. If you post your question there, and read through the posts, you will get lots of information to help you make a decision. Maynard
  3. (Mod edit: personal commentary removed), If you have had a corneal transplant, know someone who has had a transplant, or is going to have one, this information is relevant. https://www.aao.org/editors-choice/two-cases-of-corneal-transplant-rejection-after-co No discussion please as the thread will probably be locked immediately if there is. (Mod edit: Author's conclusion: Clinical significance This study is the first evidence of a temporal association between corneal transplant rejection after COVID-19 mRNA vaccination and the first case reports of DMEK rejection following any immunization. Patients need to be informed of the symptoms and signs of rejection that require immediate medical attention. Clinicians and patients should be aware of this potential risk and consider vaccination before planned nonurgent keratoplasties. In those who already have corneal transplants, it may be beneficial to either increase the frequency of existing steroid regimens or avoid reducing treatment around the time of vaccination. When patients present with signs of transplant rejection, physicians should inquire about a history of vaccination and report temporal associations to the relevant agencies. As both patients were successfully treated with topical corticosteroids, the findings in this paper should not deter administration of the COVID-19 vaccination, because early recognition and prompt treatment of rejection can yield positive outcomes) Maynard
  4. The easiest solution is to use the second 50L6 (or any other 50V/0.15A) tube as a filament ballast so you can leave R15 as specified to reduce under chassis heat. With only one channel, plate and filament voltages will run a little higher since the p/s won’t be loaded down as much, but it will be ok. If you happen to have an 820 ohm/10 watt resistor you can use that in place of R13/14. Feel free to PM with other questions. It may take me a few days to respond though. I now use full time, single speaker, mono with a RB-51 series 2 near a room corner and the combination is pure bliss to my ears. Maynard
  5. Many details would be useful: room size, listening level, distance from speakers when listening, type of music, and lots more. I have set guys up with ridiculously low powered amps which practically blew them out of the room. Your budget opens up many options like the Decware Zen Triode. It provides more than enough power for any “reasonable” listening level in my opinion. The lifetime guarantee is very appealing as is its being built in the US. If you are electronically experienced, and can build your own, I can provide you with a link to my most successful SET design which works great with LaScalas. Maynard
  6. The question is what constitutes a better power supply for SETs. If the ripple is sufficiently low to prevent any hum, all is well. The DC current draw is almost constant in SETs, so regulation is often unimportant. Of greatest importance is choosing an operating point which promotes the best linearity so distortion remains very low. Maynard
  7. Forgive me for asking, but isn’t the above discussion political? If not, can we have a discussion about the movement to end abortions in this country while funding them elsewhere? Maynard
  8. Both the amp and tuner will need restoration. The phono issue can be easily resolved. Most importantly, you need to find a good tech to do the work. Maynard
  9. This is so true. My wife is a retired special ed teacher who worked in one of the lowest paying districts in the county. She was stuck as a move to a higher paying district would have resulted in a pay cut. The district prefers to hire a new, inexperienced, person to paying a seasoned professional what they are worth. Maynard
  10. The decision can only be made by auditioning various tubes in your particular equipment. Differences in operating points can greatly influence the resultant sound. Maynard
  11. I have never used air conditioning and my listening rooms have often hit 90F during the summer. It has never been an issue. Considering the fact that electrolytic caps are typically rated for at least 85C it is not likely that they will be damaged if run on the hotter side for a few hours. Resistors are even more heat resistant. And remember that the under chassis temperatures will be lower. Maynard
  12. I don’t share your optimistic view of a 16 year old’s responsibility level when driving. https://www.myimprov.com/top-ca-teenage-driving-statistics/ Would your 12 year old child know that they had a serious adverse reaction to a vaccine, or adjuvant, as an infant which precludes their taking a coronavirus vaccine? And what about informed consent? Do you really believe a kid that age is capable of that? Here, parental permission is needed to instill drops for tonometry or pupil dilation during an eye examination if they are under 18. Same for fitting contact lenses. I see a big difference between the latter circumstances and the former. In my family kids are told not to accept any medical intervention without their parents being advised. To me, this is good sense! Maynard
  13. [EDIT BY Moderator: People will have to get their information from sources they feel provide them the most useful information] Nothing on Coronavirus will be allowed on this Forum, it is too politically intertwined to be of any use]
  14. This researcher explains why it does not. I agree with him. https://elemental.medium.com/the-absurdity-of-peer-review-1d58e5d9e661 Maynard
  15. A truly frightening glimpse into what is likely to happen. It seems that where trillions of dollars are concerned the warnings issued by many respected scientists worldwide will not be considered. What if some of their concerns turn out to be true? Can our medical system handle millions of sick people? I seriously doubt it. [Political link removed] Maynard
  16. Dr. Tess Lawrie speaks out against suppression of treatments which were saving lives: https://www.thedesertreview.com/opinion/letters_to_editor/dr-tess-lawrie-the-conscience-of-medicine/article_ff673eca-ac2d-11eb-adaa-ab952b1d2661.html In my years of being tied to the medical community I have never seen such reluctance and refusal to try treatments which are being used successfully by those in the front lines. Maynard
  17. CDC overestimates the likelihood of outdoor transmission: https://reason.com/2021/05/26/an-epidemiologist-confirms-that-the-cdc-director-misrepresented-her-study-of-outdoor-covid-19-transmission/ Maynard
  18. Yes, but when proof of vaccination is required for forum participation you will be very sorry.....😄 Maynard
  19. Today’s observation at 2 very busy stores: Supermarket—- 98% wearing masks. Those without getting “the look.” Farm supply place—. 98% without masks. Those with masks getting “the look.” (for the pedantic folks participating in this thread, the quoted percentage is approximate) Maynard
  20. I appreciate your reliance on peer reviewed papers. Unfortunately, even that is not always worthwhile as some have been found to be written by ghost writers, or contain fabricated data. There is little integrity where money is concerned. Here are some thoughts by the editor of the Lancet, certainly a respected journal. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(15)60696-1/fulltext As to the excellent article you linked about how vaccines work, it supports the concern voiced by some that incomplete eradication of the spike proteins by the immune system could cause all kinds of problems down the road and may explain the “long haulers.” Maynard
  21. The sources I cite are not representing conspiracy theorists. Rather, they are credentialed scientists who have legitimate concerns. In a normal vaccine approval process many questions would be answered before the product hits the market. It has now been shown that the real issue is the inflammatory process triggered by the spike proteins which get into the lymphatic system and wind up being distributed systemically and show up in the spleen. So questioning the possibility that the vaccines, which turn our bodies into spike protein factories, could result in vascular and organ damage over time makes sense. It has been shown that pulmonary arteries are damaged by them, as one example. I have been tied to the medical community for decades (mostly in ophthalmology) and have attended many medical conferences at which prominent doctors gathered to examine patients with unusual pathologies to discuss various treatments to try. Never did I encounter a situation in which a “mainstream view” was the only one considered acceptable. It was always, “we need to investigate this or try that.” Sadly, that attitude has been totally absent with coronavirus resulting in serious deficits which have cost countless lives. Maynard
  22. That has been the unfortunate side of the “science” all along- anyone who disagreed with the mainstream view has been “debunked and discredited.” Such an attitude has cost lives during this crisis. The questions raised in the letter from those doctors are quite valid. Maynard
  23. I should tell my friends in the medical community to stop sending me these thought provoking pieces of information. I’m posting it to show that some doctors, who have good credentials, do not agree with some of the mainstream views and seek answers to their questions. This is what science should have been doing from the beginning of the pandemic. https://viruswaarheid.nl/belangrijk/letter-to-ema-28-february-2021/?__cf_chl_managed_tk__=3f445ea2f0f4f01ea4be2a3444cb89cc936ef94f-1622234946-0-AXLcNVn-FGrKfolbSKRzPoaloWU3yRuiamXdSxHsDY6o6qsaOdyYarcVbG8Z2pqrWKBy1qr1U8wWzjgE-urYJ0zXiovsBAVkyF8i16FSuVOPCuPQth4ABvrZSdEui2OSyI-adZGJM0AXC8GFYzxYRxBcO0FIWoxqODQaDEbUeWhADUvYCHNRJdnkQZHLkqDn_brN76hAtJl6m5y-TVBy3tDuQrngULQuqA4L72PXZ2eYiQDUW2rRQWEGwOi6KC0G02W6EXQDSPzQC5ZgYK_5BHueqobWVPkqfkQ8XJ2HO591abkR8kq0a7IZDYcqG5rRSf83C5ta-HREcazavEv5dBG9fHpnaBZjS-Kct4S_ksOK5UrkKe-dHI4JnTi4GXWYoG9haNz2H1vkpwGr5auK-DGOXcfb52fv4gDfF-XQf1tdr3WT6hdvGU34itqXSKxAoa760Wpxm6ReFI3kAxQDGPebFpwdeeuqZ-x_WpUjxgcDNAx4t8gqccC8sT24QW6QsiJjPQD6ueaLe18t5rffGKgy9P9BDCfNyMdnXN5F5vQRSHOcbJ9ZY32vysYaJFav5jBJgCQTeQP2tfs22HjaUgn9oSIA8SGKCnjQ8N5HyHFYlEnuIcwdylZyJ-BAiiOA-s0Z0HrqejBvh3rDyefITq38BXx5tsJQCENBzL3vqLP8 Maynard
  24. I’ll quote myself here. It is good to see that the above policy has generated some backlash from doctors. https://troymedia.com/politicslaw/evidence-points-to-failure-of-covid-19-lockdowns/#.YLFPFi33ahA Maynard
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