Revox B77 MkII - UK Vintage Radio Repair and Restoration Discussion Forum

mscottrey · 30th Mar 2006, 8:21 pm

I have a Revox B77 MkII which needs work, but is in fundamentally good condition. Powers up fine, but the transport doesn't function - this only since I was away and it was in storage. Heads seem OK. Don't know whether to keep and fix, or sell. Any suggestions or offers?

Welsh Anorak · 30th Mar 2006, 9:34 pm

Hi there

How dead is dead

If the solenoids clunk and the reels turn then it's probobly an autostop fault.

If it just sits there and won't play ball, see if the capstan's going round. If not, PSU is in trouble. If it is turning, then the fault's probably on the horizontal PCB to the left of the PSU above the buttons. The buttons do fail but not usually all at once. I can scan the circuit if you need it - but tell me which PCB!

If you need bits it may be worth buying an old ASC PR99 on e-bay as the transport boards are the same, and tatty ones don't make too much money.

If you do want to sell send me a PM - not sure where you are - I'd be especially keen if it is 2-tr and hi-speed.

Glyn

reel-to-reel-man · 31st Mar 2006, 1:24 pm

Hello, the B&& is a machine I weould be interested in too

can you tell if the capstan is spinning? is the B&& the one with a small light to sensor the tape, located under the head cover, is that working? does the VY bulbs light up and does the meters twitch when turning on the machine? I am getting hold of a PR99 for spares though I think you will need the spares from a MKI machine where mine are MKII (Think the older does not have IC's in it).

30th Mar 2006, 8:21 pm	#1
mscottrey Retired Dormant Member Join Date: Mar 2006 Posts: 1	Revox B77 MkII I have a Revox B77 MkII which needs work, but is in fundamentally good condition. Powers up fine, but the transport doesn't function - this only since I was away and it was in storage. Heads seem OK. Don't know whether to keep and fix, or sell. Any suggestions or offers?

30th Mar 2006, 9:34 pm	#2
Welsh Anorak Dekatron Join Date: Apr 2005 Location: North Wales, UK. Posts: 6,928	Re: Revox B77 MkII Hi there How dead is dead If the solenoids clunk and the reels turn then it's probobly an autostop fault. If it just sits there and won't play ball, see if the capstan's going round. If not, PSU is in trouble. If it is turning, then the fault's probably on the horizontal PCB to the left of the PSU above the buttons. The buttons do fail but not usually all at once. I can scan the circuit if you need it - but tell me which PCB! If you need bits it may be worth buying an old ASC PR99 on e-bay as the transport boards are the same, and tatty ones don't make too much money. If you do want to sell send me a PM - not sure where you are - I'd be especially keen if it is 2-tr and hi-speed. Glyn

31st Mar 2006, 1:24 pm	#3
reel-to-reel-man Heptode Join Date: Jan 2005 Location: Paignton, Devon, UK. Posts: 805	Re: Revox B77 MkII Hello, the B&& is a machine I weould be interested in too can you tell if the capstan is spinning? is the B&& the one with a small light to sensor the tape, located under the head cover, is that working? does the VY bulbs light up and does the meters twitch when turning on the machine? I am getting hold of a PR99 for spares though I think you will need the spares from a MKI machine where mine are MKII (Think the older does not have IC's in it). __________________ Vintage recorder collector www.vintagerecorders.co.uk