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| Thread ID: 30846 | 2003-03-04 18:18:00 | OT - measuring the power coming out of a car stereo... | tango (2697) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 125593 | 2003-03-06 04:02:00 | I had a beaut pair of hi-power ultralinear audio output transformers, (the ones with the special silicon steel laminations) that I kept for years in anticipation of one day building a quality valve amplifier. I went to get them out the other day, when the thought of finally getting around to building it tickled my fancy, only to find that there was one missing. :( I don't fancy building a mono amp, so that's the end of that. :_| Cheers Billy 8-{) :| Procrastination doesn't only steal time, it steals dreams too! |
Billy T (70) | ||
| 125594 | 2003-03-06 04:06:00 | I believe that Leak keep an order book for transformers. When they get the appropriate number they order a batch. However. Have you looked at the price of valves these days? $35 for an ECC83. KT66s through the roof. I have to confess that my 3-3 used ATC transformers. :D |
Graham L (2) | ||
| 125595 | 2003-03-06 04:28:00 | Boy am I glad I didn't throw out my boxes of valves, I don't have any KT66's but I do have some ECC82's & 83's, and some EF86's too. I also have a few EL36's and they would work fine, if only I had the other transformer. Life is cruel. :( Billy 8-{) :| |
Billy T (70) | ||
| 125596 | 2003-03-06 05:54:00 | Hi Terry, Billy, . . Very nice to have these nostalgic valve amplifier thoughts . Yes I sure remember the Mullard 510 amp . Made one in about 1956, and another later when stereo was introduced . Great sound, with big enclosures & 12" Wharfedales . Later on made another 20watt amp using EL34's . Those were the days . The price's you mention of valves these days are alarming . Luckily like you I have some spares in the junk box . Thankyou also Billy for your clear analysis of power output, distortion, and speaker damage, which should clarify things for many PF1'ers . Cheers . . |
Bazza (407) | ||
| 125597 | 2003-03-06 06:06:00 | Hi Billy, You make some interesting, intelligent points. I was only going by what I had read in audiophille magazines such as Absolute audio etc. Its a while since I've read up on the subject, so I may well have my facts scew-wiff. Its good to read something on the forum regarding audio for a change. |
Baldy (26) | ||
| 125598 | 2003-03-06 07:28:00 | Been searching all evening for a 1968 Practical Wireless (aka "Camms Comic" to quote some prices to eat your hearts out, but no luck, from memory in those days an ECC82/12AU7 would have been about 2/6d to 5/6d How about this from May 1940 Wireless World valve data supplement, KT66 15/-, the KT66 was a very long lived valve and was even cheaper after the war as government surplus, as was the 6L6G quoted here at 15/- . |
Terry Porritt (14) | ||
| 125599 | 2003-03-06 07:54:00 | Yes Terry, in those days the valves were "cheap" . . Soon after that in the 1960's, transistors were the next big deal . I recall being keen to construct a transistor radio, but after pricing the components, flagged it away . hard to believe now, as transistors are also "cheap", but then each transistor to construct a 7 or 8 transistor radio, was about $6 each plus all the other components like coils, transformers speaker, etc . . A big price in those days, as one transistor represented about 1/4 of the weekly wage . An early Ultimate, or Pacemaker retailed for about $78 complete . Yes, those were the days . |
Bazza (407) | ||
| 125600 | 2003-03-06 08:49:00 | Yikes talk about nostalgia . It would seem that these days it takes about 400 new watts to do the work of 4 old watts . Hmmmm! I remember building amplifiers with two 6V6GT’s in push-pull and driving people out of halls . I think 6V6GT’s were rated about 4 . 5watts continuous and 13 watts peak . As Bazza said, a couple of 12 inch Wharfedales and you had all the volume you’d ever need . Them were the days! As an aside I can remember being told (by a very respected tutor at Petone Polytechnic) that transistors were a novelty item and would never have any commercial use! :8} Bob |
B.M. (505) | ||
| 125601 | 2003-03-06 19:57:00 | Would this amplifier (homepages.paradise.net.nz) be any good for a car? (shame it's not valve) :D .Clueless |
Clueless (181) | ||
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