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- From: kirk@hpcc01.corp.hp.com (Kirk Lindstrom)
- Date: Tue, 22 Dec 1992 18:09:14 GMT
- Subject: Re: Re: Class A MOSFET Power Amp for sale...
- Message-ID: <26130131@hpcc01.corp.hp.com>
- Organization: Shredding the water of SF Bay, HP-OCD
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!col.hp.com!news.dtc.hp.com!hpscit.sc.hp.com!hplextra!hpcc05!hpcc01!kirk
- Newsgroups: rec.audio.car
- References: <1992Dec11.001832.13833@henson.cc.wwu.edu>
- Lines: 44
-
- >kirk@hpcc01.corp.hp.com (Kirk Lindstrom) writes:
- >> Bolt is in fact a "Class A" amplifier, but my guess is it is a reference
- >> to their input stage in the hopes of fooling people. A true class-A
- >> output amp for car audio is ludicrous. Next we'll get tubes! I
- >>
- >> Kirk out
- >
- >Class A in a car is not possible in an output stage from what I have
- >read... still looking for the source, though I suspect Autosound 2000.
-
- Well, anything is possible. It would be fairly easy to make a low power
- true class-A amp for auto use, just few would buy it as the speakers to
- appreciate it aren't that common and most wouldn't buy it since the "spec's
- were so poor" i.e. not enough wattage for the avg boomer. The better home
- amps I've listened to lately are class-A for up to maybe 25 watts and then
- switch into AB operation which is a neat trick.
-
- >As for tubes, Milbert introduced their BaM-230 about 4.5 years ago.
- >It is a $2000 (list) 30 watt per side tube amp using 6JN6 output
- >tubes. The problem with tubes in autosound had to do with the high
- >voltage needed to drive them, but this baby is supposed take care of
- >the problems with an impressive p/s. I'd love to get my hands on one!
- >
- I've seen pictures of tubes in cars. I wounder how long the filiments last if
- you drive over rough roads with sports-car or even van suspension? High
- voltage is OK, your coil does just fine, it just tubes aren't very efficient
- and the way to make money in car audio is to squeese as much delivered power
- as possible out of alternators and batteries.
-
- Thanks for the info.
- >\ Jason A. Reiser \ Send E-Mail to jreiser@scott.skidmore.edu \
- >---------------------------------------------------------------
-
- Kirk out
- => "We are what we pretend to be." - Kurt Vonnegut Jr.
- +---------------------------------------------------------------------+
- | Kirk Lindstrom - OCD Product R & D | Hewlett-Packard Co. M/S: 91UA |
- | Engineer/Scientist, Hardware | |
- |------------------------------------| Optical Communication Division |
- | kirk_lindstrom@sj.hp.com | |
- | Kirk Lindstrom / HP0100/UX | 370 W. Trimble Rd. |
- | ph 408 435 6404 | fax 408 435 6286 | San Jose, CA 95131-1096 |
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