Unusual HiFi products from the past.
Comments
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SeleniumFalcon wrote: »I'm curious about this amplifier, I know William Z. Johnson (founder of Audio Research) had a store in Minneapolis and eventually worked for and then bought the Peploe Electronics company. I wonder if Goodell was involved somehow in the early audio scene.
Indeed. It is unfamilar to me, too. I may ask some of the local gurus about it.
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Thank you! @mhardy6647
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I think if I had an A-2, I could probably live with mono.
So, about that uncaring
amplifier. I asked a couple of places, including the fine little hifi fourm, www.hifihaven.org
A hifihavenite came up with the schematic (I've been busy today, so I didn't even think to look!):
One of the Northern New England gurus suggests a fairly simple approach:I would suspect since they are both octal tubes that they wired the 6L6 to operate as a triode. When the 6B4 is plugged in the resistor from screen to plate (6L6 triode connection) is floating.
I am not sure how they manage the separate heater/cathode wiring of the indirectly heated 6L6 vs. the filament/cathode of the DHT 6B4? Maybe I am just really slow...
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Thanks, that's great information. I thought maybe it used Billy Z's balanced cross-coupled design.
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mhardy6647 wrote: »mhardy6647 wrote: »^^^ Brutalist HiFi architecture
Takes me back to "Computer Controlled" Pioneer of the 80's. Gotta love the LED meters, too....
Topic: Pioneer Champagne Gold series HiFi's early 80's-https://www.avforums.co.za/index.php?topic=77357.0
I... I wouldn't mind havin' one of those 'Champagne Series' Pioneers...
Not for any particular reason... just... 'cause.
If you decide to put a Champagne system together, I have a CT-6R cassette deck in good working order that would make a nice addition.Stan
Main 2ch:
Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.
HT:
Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60
Other stuff:
Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601 -
Who knew good ole' B-more had a tape recorder manufacturer? -
KEF 207s / Coda Continuum / SST Thoebe II / Oppo BDP-105D / Technics SP-15 w/SAEC WE-308SX & Ortofon AS-309 arms / Ikeda 9C2 & Dynavector XX2 Mk II carts -
Not a coffee table format, but 6 speakers 6, too -- from Heathkit!
source of inside page scan: https://worldradiohistory.com/Archive-Catalogs/Consumer/Heathkit-1961-Fall-Winter.pdf
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oh, and speaking of Heathkit...
in case any of all y'all thought subwoofers and/or supertweeters were "modern" (e.g., 1970s) ideas...
mais non, mon frere
source: https://worldradiohistory.com/Archive-Catalogs/Heathkit-Catalogs/Heathkit-Catalog-1959.pdf
These used pretty good Jensen drivers. The SS-2 used the P8RS extended range 8" woofer and RP-103 compression tweeter and horn. The SS-1B used some 12" Jensen woofer (not sure which -- teh webz sez P15LS) and, IIRC, the redoubtable Jensen RP302 tweeter.
I can vouch for the little two-ways (SS-2); they were/are quite pleasant & musical loudspeakers; great with tube amps.
(one of my erstwhile pair)
(borrowed photos from eBAY)
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"...the world's finest recorder of its type"
That's kind of hard to argue with, isn't it?
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Speaking of Graybar -- WRH has a smattering of their catalogs online now.
Talk about someone for everyone (in terms of electrical/electronic things, that is)!
https://worldradiohistory.com/Graybar-Catalog.htm -
SeleniumFalcon wrote: »
15-16k in 1949 was a HUGE sum of money !! Shoot that was 6 automobiles worth right there -
SeleniumFalcon wrote: »
15-16k in 1949 was a HUGE sum of money !! Shoot that was 6 automobiles worth right there
Oops...I think you added a number after the decimal point. I see $1.5K. Still a crap ton of money back then.KEF 207s / Coda Continuum / SST Thoebe II / Oppo BDP-105D / Technics SP-15 w/SAEC WE-308SX & Ortofon AS-309 arms / Ikeda 9C2 & Dynavector XX2 Mk II carts -
Pesky decimal thingies....
Yes I caught it too late to fix. -
This is for sale near me...from the ad:
"Custom Coffee Table:
Two 12" Audiobahn Special Edition Subwoofers
1920 Watt Power Acoustik Amplifier w/ a Mosfet power supply
Tuned to 33Hz: plays low, powerful, bass.
Blue neon backlight.
Plexiglass front, solid oak top, MDF sides/back, PVC ports.
Does not include power supply to run indoors.
Price: $400 for everything but the power supply.
Part-out prices:
Amp w/ bass knob: $150
Subs: $100 each
Love this thing, wife says it's time for it to go!"
KEF 207s / Coda Continuum / SST Thoebe II / Oppo BDP-105D / Technics SP-15 w/SAEC WE-308SX & Ortofon AS-309 arms / Ikeda 9C2 & Dynavector XX2 Mk II carts -
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How's that for a simple crossover?
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Ken, I admire your appreciation of things that have come before us."Sometimes you have to look to the past to understand where you are going in the future"Anger is just anger. It isn’t good. It isn’t bad. It just is. What you do with it is what matters.
You can use it to build or to destroy. You just have to make the choice. Jim Butcher
Harry / Marietta GA -
Thanks, I think it's good to understand, in a small way, where this hobby came from.
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SeleniumFalcon wrote: »
How's that for a simple crossover?
Both highs and lows, must be Boz... ak.
PS I don't even recognize the Jensens in that 1949 ad!
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There sure were some strange looking Coaxial designs in my fathers youth. Many being 16 ohm drivers as well.
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16 ohms was a good load for transformer-coupled vacuum tube amplifiers -- still is!
That said, there is another way to design output transformerless tube amps than the lots of power triodes in parallel route (Atma-Sphere, Transcendent Sound, etc.). Philips and Stephens, among others, went the other route.
source; http://www.hifilit.com/Stephens/Stephens.htm
coax with 500 ohm VCs.
I have the 16 ohm morph of that coax -- only one, sadly.
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Customode?
