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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Re: Ever try spinning(i.e. indoor exercise bike)during the winter months posted by Russ57 on July 1, 2002 at 07:26:56:
Hey Russ,
To the Fisher first.
Selenium rectum-fryers have a higher internal impedance and lower conversion efficiency than silicon ones. Not always common knowledge, but anybody with any electronics training or experience with the technology can and...cough!...should have...
I'm actually surprised that you aren't getting more than 13.3V!
I think it is a bit high, only the truly lazy and unconcerned would let it stay this high. Specs call for the filament voltages to generally be maintained within a 5% tolerance. We are about 12% or so too high here...I find that since Hi-Fi isn't computers and TV sets and elevator controls, filament voltages are QUITE critical to the sound.
Going too low is a lousy idea, too. Not so much from a reliability/durability standpoint (they will last longer running at 12.3V as opposed to 13.3V, but you are on the threshold of getting a thinner, more dried-out kind of tone than you should. Not surprisingly, you'll discover that 13.3V is very rich, warm & sweet. Probably, TOO much so! Detail gets blurred, timbres thicken, transients dull and slow...
I find that running as close as possible to the correct voltage is best all around. If you are going to err, let the voltage go a tad high (12.7V, for example). This sounds better than a tad low, although the Fisher is a pretty sweet performer to begin with, so 12.5V won't scare you to listen to, either...
The Fisher receivers all run too hot. Wiring up the filaments so that they see the correct voltage, yet configuring the bias supply around the filament supply so that it gets as high a B- as possible, would be best. The 400 really, really needs a bias control! There are repercussions in terms of PS cap reliability if bias is dropped too far. The reduced quiescent power supply load will cause the HT to rise, perhaps getting dangerously close or exceeding capacitor voltage ratings. Worse, it can also raise voltages to driver and input/preamp stages downstream, throwing circuit linearity out of whack...
Tricky business, this, we are drifting into heavy modification land...As to bikes, Schwinn isn't well represented in Canada, which is where I so happen to live. Finding this "Johnny G" thing could be a real hassle! I was hoping to get the minimum in a trainer, but I'll take your word for it that this Schwinn wind-trainer is much more involving and/or realistic and therefore the one to have. Out of curiosity, I don't believe you mentioned either what they cost new or what the typical resale market prices are. That assumes that you know off-hand! But you sound like you know your stuff...
As for aerobics training, this boy is right outside of the box! I'm 5'9", 130lbs. My standing heart rate is an uninspiring 65-80bpm. It's typically in the low 70's. When I am maxxing out, and I can FLY, I don't get my heart rate anywhere beyond 130-140bpm!
I think my trick is, I can get my heartrate up around that seemingly lowish limit, AND JUST KEEP IT THERE AN AWFULLY LONG TIME.
So I'm light, I'm aerodynamic, and I have the lung capacity of a guy at least 6 inches taller and substantially larger in the rib cage than I am.
It's called: BEING A FREAK OF NATURE.
I don't think most sports are about developed talent. Either God gives you all the right basic tools, or you take up tiddly-winks and try not to be jealous about it. Cycling happens to favour my particular genetic card. Training brings out that last 25% or so, but I've neither been able to get beyond a certain point, nor have I been unable to get up to a certain level of fitness depending on my training regimen.
At a certain point, I decided that as good as I was, I was not the very best. There were alot of things about the competitive scene that I definitely did not like. The cliqueyness, the petty snobbish arrogance, the overreaching competitiveness, the rules, the relentless training.
I looked myself in the mirror and said; "Hey! Good or no good, I do this because I think it's a BLAST. The minute it becomes something else, something stupid, vain and utterly unpleasant, I've gone and LOST IT."
So maybe with a qualified trainer I could improve my aerobic performance. But having participated in a small number of group sessions where these things were tested, I found that I was one unusual dude...
To train, I find the most important thing to do is to stay limber. Everything else follows. DON'T GET HURT! Then you have to break the training regimen, you can't do what you want, you aren't on the steady course of improvement, no matter how minor or how stalemated it has become...I don't find I bounce back from injuries better than before. In fact, I find it is always the case that I lose something that I remembered having, and I'm a bit slower from then on. I can recall most incidents where I had pushed my limits too far, the resultant injuries and the subsequent lower average riding speeds, as documented by my bike computer, which in every case never really fully recovered...
Maybe if I train MORE, and train more intensely, I can improve despite my aging. But what am I doing?
I like cycling, and I'm gonna keep it fun. Thanks for the advice, but pardon me for being a bit set in my ways...As long as I am not hurting myself without knowing, I'm happy to continue cycling as I always have, I'm just having fun.
Cheers,
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Follow Ups
- Re: Ever try spinning(i.e. indoor exercise bike)during the winter months - Joe Rosen 04:46:37 07/07/02 (0)
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