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Global Moderator
Miscell. gratuitous hifi pics Oct 2, 2019 17:11:06 GMT 12
foveaux likes this
Post by Citroen on Oct 2, 2019 17:11:06 GMT 12
Sought after by me at least.
I sold mine and then spent a lot of time and money to find a replacement! So now have a yellow (non working) and a red one 
Cliff
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Post by Owen Y on Oct 11, 2019 11:14:58 GMT 12
Another from the "They Don't Make 'em Like They Used To" file....
 Yamaha CR-2020 Receiver, late '70s, 105 wpc into 8Ω. DarkLantern blog - darklanternforowen.wordpress.com
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Global Moderator
Miscell. gratuitous hifi pics Oct 27, 2019 15:03:45 GMT 12
- Edited Oct 27, 2019 15:06:15 GMT 12 by michaelw
Post by michaelw on Oct 27, 2019 15:03:45 GMT 12
i take your yammie and raise you a sansui g9000 !
  technic's entry in the monster receiver wars  
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Post by andrewp on Oct 27, 2019 16:36:33 GMT 12
Is that SA 1000 turbo charged...lol... Man alive with that many flicky things and dials it should be!!
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Post by Owen Y on Oct 29, 2019 14:41:55 GMT 12
Oh yes, that Technics is a beast
 I'll see you with this Sansui QRX-7001 4-Channel Receiver (1974-77)... 
DarkLantern blog - darklanternforowen.wordpress.com
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Global Moderator
Miscell. gratuitous hifi pics Oct 29, 2019 16:07:21 GMT 12
- Edited Oct 29, 2019 16:10:32 GMT 12 by michaelw
colinf likes this Post by michaelw on Oct 29, 2019 16:07:21 GMT 12and the the godzilla of receivers, the sansui g33000 - 3--wpc - 5 digits in the model number - physically separate tuner/pre and power sections  
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Post by Owen Y on Mar 6, 2020 20:12:08 GMT 12 Loudspeakers - Rank Arena, Horsens (Denmark) HT25 - c.1972 DarkLantern blog - darklanternforowen.wordpress.com
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Post by Owen Y on Mar 6, 2020 20:17:38 GMT 12 Technics SE/SU 10000 Pre/Power amplifiers - c.1973 Loudspeakers - unidentified DarkLantern blog - darklanternforowen.wordpress.com
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Post by michaelw on Mar 6, 2020 22:51:24 GMT 12
^ happy faces
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Administrator
Miscell. gratuitous hifi pics Mar 13, 2020 11:39:36 GMT 12
- Edited Mar 13, 2020 15:22:33 GMT 12 by Owen Y
snewt likes this Post by Owen Y on Mar 13, 2020 11:39:36 GMT 12 Audio Research SP3A preamp, Audio Research D-150, Tannoy Arden - c.1974-76. DarkLantern blog - darklanternforowen.wordpress.com
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Global Moderator
Miscell. gratuitous hifi pics Mar 13, 2020 13:53:23 GMT 12
- Edited Mar 13, 2020 13:55:12 GMT 12 by michaelw
Post by michaelw on Mar 13, 2020 13:53:23 GMT 12retro friday americana
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Post by cartridgeguyonline on Mar 13, 2020 14:28:28 GMT 12
OK lets see: Marantz 1060 amp, Fisher 800 series tuner, Thought the amp at the bottom was a Leak ?, and a Macintosh off to the side ? How did I do ?
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Global Moderator
Miscell. gratuitous hifi pics Mar 13, 2020 14:42:20 GMT 12
- Edited Mar 13, 2020 14:43:26 GMT 12 by michaelw
Post by michaelw on Mar 13, 2020 14:42:20 GMT 12
1/4, that's a fail !
 marantz model 7 preamp marantz model 10b tuner marantz model 8 power amp mac to the side.
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Post by snewt on Mar 14, 2020 7:30:43 GMT 12Audio Research SP3A preamp, Audio Research D-150, Tannoy Arden - c.1974-76. Mmmmm.15" Tannoys and Audio Research. A sound I'm familiar with... 
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Post by Owen Y on Mar 14, 2020 15:34:56 GMT 12
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Connoisseur
Miscell. gratuitous hifi pics Mar 14, 2020 19:34:45 GMT 12
- Edited Mar 14, 2020 19:38:32 GMT 12 by colinf
Post by colinf on Mar 14, 2020 19:34:45 GMT 12
Love the old ARC stuff, I used to service them in the late 80s and 90s. The poweramps had a complicated cross-coupled input stage and partly cathode-coupled output stage that I studied carefully. Roger Modjeski and I used to discuss ARC and William Z Johnson’s design philosophy quite a bit. Later ARCs were simpler. The SP3A had power supply flaws but classic Marantz 7-style circuitry. That’s back in the days when manufacturers put the schematic diagram in the instruction manual! Today’s manufacturers keep their schematics hidden and only let approved personnel see them.
AMR-iFi R&D
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Post by snewt on Mar 17, 2020 6:35:11 GMT 12I think Dave had an Audio Research pre, and I had/have (still being repaired!) an SP6b, and I am currently running an LS5mk3 which I love. Dad had a Conrad Johnson, can't remember the model.
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Post by Owen Y on Mar 17, 2020 8:03:48 GMT 12
Ah yes, Dave W had an SP6B & I remember we A/B'd it against my (slightly tweaked) SP8 - I was surprised that the SP6B held its own easily, perhaps even a little more transparent & neutral tonally.
I'll be interested in how your SP6B compares against the LS3. What's wrong with your SP6B? DarkLantern blog - darklanternforowen.wordpress.com
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Post by michaelw on Mar 17, 2020 9:35:14 GMT 12
always liked the conrad johnson sound, despite the reverse phase.
sidebar - seems a lot of likeable tube product reverses phase - cj, counterpoint, audible illusions et al
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Member
Miscell. gratuitous hifi pics Mar 17, 2020 15:30:56 GMT 12
via mobile - Edited Mar 17, 2020 15:47:00 GMT 12 by snewt
Post by snewt on Mar 17, 2020 15:30:56 GMT 12
I'll be interested in how your SP6B compares against the LS3.
What's wrong with your SP6B? The LS5mk3 has more at each end. More detail, more bass. Delicious midrange. What more could you want? The SP6b has a hum which has yet to be fixed. Bit of a problem as it has so far cost $500 for the 4 power supply caps and it's getting to the point where it will be uneconomical to continue and that would be a shame. It's just sitting in the too hard basket at the moment.
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Post by Owen Y on Mar 17, 2020 16:16:26 GMT 12
Who is fixing it?
DarkLantern blog - darklanternforowen.wordpress.com
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Member
Miscell. gratuitous hifi pics Mar 17, 2020 17:20:17 GMT 12
via mobile
Owen Y likes this
Post by snewt on Mar 17, 2020 17:20:17 GMT 12
After a tech in Tauranga had it for a year I took it to Clarry who did what he could then passed it on to Mark Maloney. He is stumped I think.
(Maybe you should move this to it's own thread Owen 😉)
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Connoisseur
Miscell. gratuitous hifi pics Mar 17, 2020 20:12:35 GMT 12
- Edited Mar 17, 2020 20:49:49 GMT 12 by colinf
Post by colinf on Mar 17, 2020 20:12:35 GMT 12
SP6B hum.....check the power supply regulators with an oscilloscope, they were prone to oscillating and the result was endemic hum. As long as grounding and the heater supply regulator are in order that will be the reason.
Edit...forgot to also say, check the heater supply power supply capacitors, they will be very old by now and need replacing. The high voltage power supply derives its reference voltage from the heater regulator. AMR-iFi R&D
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Post by snewt on Mar 18, 2020 5:38:07 GMT 12
Thanks Colin, I wish you were still here.
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Post by colinf on Mar 18, 2020 6:12:53 GMT 12
I wish I was there too sometimes.
You could always send it here....Mark it as ‘for repair’ on the customs form or you’ll get stung! AMR-iFi R&D
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Post by Owen Y on Mar 20, 2020 9:07:19 GMT 12
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Connoisseur
Miscell. gratuitous hifi pics Mar 20, 2020 9:13:35 GMT 12
- Edited Mar 20, 2020 9:19:53 GMT 12 by colinf
Post by colinf on Mar 20, 2020 9:13:35 GMT 12
They don’t build them like that anymore!
One of the classic Sansuis I studied carefully. Also the Au-X1 and my own BA-F1. They were some of the first amps with LAPT fast bipolar transistors by Sanken. (LAPT- Linear Amplifier Power Transistor). They could reach speeds of up to 100mHz so that the negative feedback correction factor would be high at high audio frequencies. AMR-iFi R&D
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Pundit
Miscell. gratuitous hifi pics Mar 22, 2020 18:43:07 GMT 12
- Edited Mar 22, 2020 18:55:30 GMT 12 by raveydave: aesthetic.
Citroen likes this Post by raveydave on Mar 22, 2020 18:43:07 GMT 12We just spent the afternoon in social isolation with 95BFM (Back on the Goodfoot >> Swapmeet >> Border Radio), and I am once again in awe of this tuner. It is a truly astounding piece of hifi history. Just trying to find a suitable mop handle attachment for my trusty McIntosh MR71 now... 🤪  
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Post by Owen Y on Mar 22, 2020 20:07:46 GMT 12
Marantz 10B, wow
DarkLantern blog - darklanternforowen.wordpress.com
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Post by colinf on Mar 23, 2020 2:18:55 GMT 12
Great tuners, we had 2 we used to keep running at the shop.
AMR-iFi R&D
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