I often visit the man of Gumtree Krell fame. See what he has, try it out and if I like it I buy it...
He had this B&O type 608 that I took home to try. What a nice surprise. Sounds pretty decent for a 1960 vintage intergrated amp...
The problem I have is that I have searched high and low and cannot find a schematic anywhere.
Would this preclude the unit from ever being reliably repaired and/or restored. I like it because I think it is beautifull but I am in no doubt that it is going to need work if it is ever to sound good again.
Here are some links:
http://beophile.com/?page_id=1715
These are the specs according to the above page:
High Fidelity Stereo Amplifier 608 details:
Output power? 2 x 15 Watts at or 16 ohms impedance with distortion less than 2% (0.5% at 10 Watts)
Inputs and sensitivity (for 5 Watts output): 1. Gramophone: Magnetic pickup 2 mV RIAA equalisation. (By changing the adaptor this input can be for crystal pickup 50 mV or low impedance pickup 0.5 mV.) 2. Tape recorder 100 mV. 3. Microphone 50-200 Ohms, 160 micro Volts. 4. Radio 100 mV
Frequency response: 20-20,000 c/s ?1 ?0
Noise level: -130 dB
Crosstalk between channels: -50 dB
Bass control: ?12 dO at 50 c/s.
Treble control: ?12 dB at 10 kc/s
Rumble filler: -2 dB at 50c/s, -12 dB at 30 c/s, -22 dB at 20 c/s
Scratch filter: -3 dB at 5 Isc/s, -12 dB at 7 kc/s, -22 dB at tO kc/s
Pre-amplifiers: Interchangeable printed circuit boards
4-stage transistor pre-amplifier with low noise input transistor, one AC507, three 0075 each
Power amplifiers: One ECC83, four ECL85
Negative feedback: 16 dB
Power supply: 110 or 220 Volts AC, 72 Watts
Dimensions (H x W x D): 180 x 465 x 208mm
Weight 10,5 kg
Here are some pictures...
B&O Type 608 (Front) by arclients, on Flickr
B&O Type 608 (Front2) by arclients, on Flickr
B&O Type 608 (Back) by arclients, on Flickr
B&O Type 608 (Back2) by arclients, on Flickr
B&O Type 608 (inside) by arclients, on Flickr
B&O Type 608 (inside2) by arclients, on Flickr
B&O Type 608 (inside3) by arclients, on Flickr
B&O Type 608 (underside) by arclients, on Flickr
B&O Type 608 (underside2) by arclients, on Flickr
B&O Type 608 (underside3) by arclients, on Flickr
B&O Type 608 (underside4) by arclients, on Flickr
B&O Type 608 (underside5) by arclients, on Flickr
Wow!
You made it all the way to the bottom of the page...
Is this a viable purchase with the view to fixing it up and making it funtional. I am not too precious about keeping the innards 100% original...
He had this B&O type 608 that I took home to try. What a nice surprise. Sounds pretty decent for a 1960 vintage intergrated amp...
The problem I have is that I have searched high and low and cannot find a schematic anywhere.
Would this preclude the unit from ever being reliably repaired and/or restored. I like it because I think it is beautifull but I am in no doubt that it is going to need work if it is ever to sound good again.
Here are some links:
http://beophile.com/?page_id=1715
These are the specs according to the above page:
High Fidelity Stereo Amplifier 608 details:
Output power? 2 x 15 Watts at or 16 ohms impedance with distortion less than 2% (0.5% at 10 Watts)
Inputs and sensitivity (for 5 Watts output): 1. Gramophone: Magnetic pickup 2 mV RIAA equalisation. (By changing the adaptor this input can be for crystal pickup 50 mV or low impedance pickup 0.5 mV.) 2. Tape recorder 100 mV. 3. Microphone 50-200 Ohms, 160 micro Volts. 4. Radio 100 mV
Frequency response: 20-20,000 c/s ?1 ?0
Noise level: -130 dB
Crosstalk between channels: -50 dB
Bass control: ?12 dO at 50 c/s.
Treble control: ?12 dB at 10 kc/s
Rumble filler: -2 dB at 50c/s, -12 dB at 30 c/s, -22 dB at 20 c/s
Scratch filter: -3 dB at 5 Isc/s, -12 dB at 7 kc/s, -22 dB at tO kc/s
Pre-amplifiers: Interchangeable printed circuit boards
4-stage transistor pre-amplifier with low noise input transistor, one AC507, three 0075 each
Power amplifiers: One ECC83, four ECL85
Negative feedback: 16 dB
Power supply: 110 or 220 Volts AC, 72 Watts
Dimensions (H x W x D): 180 x 465 x 208mm
Weight 10,5 kg
Here are some pictures...
B&O Type 608 (Front) by arclients, on Flickr
B&O Type 608 (Front2) by arclients, on Flickr
B&O Type 608 (Back) by arclients, on Flickr
B&O Type 608 (Back2) by arclients, on Flickr
B&O Type 608 (inside) by arclients, on Flickr
B&O Type 608 (inside2) by arclients, on Flickr
B&O Type 608 (inside3) by arclients, on Flickr
B&O Type 608 (underside) by arclients, on Flickr
B&O Type 608 (underside2) by arclients, on Flickr
B&O Type 608 (underside3) by arclients, on Flickr
B&O Type 608 (underside4) by arclients, on Flickr
B&O Type 608 (underside5) by arclients, on Flickr
Wow!
You made it all the way to the bottom of the page...Is this a viable purchase with the view to fixing it up and making it funtional. I am not too precious about keeping the innards 100% original...
