[pancake]

I have a pair of these amps that need relays. I burnished the
contacts about 10 yrs ago, but they've oxidized since. NAD no longer
stocks them. Anybody know of a source ?

Thanks
Pancake

[Tim Schwartz]

Pancake wrote:
I have a pair of these amps that need relays. I burnished the
contacts about 10 yrs ago, but they've oxidized since. NAD no longer
stocks them. Anybody know of a source ?

Thanks
Pancake

Good morning,

Those relays are as scarce as hens teeth.

What I've been doing with good results is substituting a much more
common relay, but it does require some work. I've been using an Omron
G2R-24-DC24, which is available from Digikey (www.digikey.com) as part
number Z748-ND, or Mouser (www.mouser.com) as part number
653-G2R-24-DC24. These are sealed relays and are not likely to fail again.

I mount the relay upside down to the circuit board with a strong double
sided tape. If you are careful, you can do this in a way that you can
run wires down to the PC board to make the 4 connections that you need
to make. For the relay power, you can use fairly thin (22 gage) wire.
For the Amp in and speaker out, I use 14 or 16 gage buss wire. PARALLEL
the 2 sections of the relay!!

The layout of the board is different for each channel, so you'll have
to be careful to figure out which side of the relay the wires have to
come off of. I suggest trial fitting several times before mounting the
relay, as I like to have the wires short as possible, both for the
signal path, and to have the wires hold the relay in position in case
the tape ever fails. Patience is the key. Expect this to take a couple
of hours.

Regards,
Tim Schwartz
Bristol Electronics

[pancake]

On Sun, 23 Nov 2008 13:18:34 GMT, Tim Schwartz
wrote:

Thanks


Pancake wrote:
I have a pair of these amps that need relays. I burnished the
contacts about 10 yrs ago, but they've oxidized since. NAD no longer
stocks them. Anybody know of a source ?

Thanks
Pancake

Good morning,

Those relays are as scarce as hens teeth.

What I've been doing with good results is substituting a much more
common relay, but it does require some work. I've been using an Omron
G2R-24-DC24, which is available from Digikey (www.digikey.com) as part
number Z748-ND, or Mouser (www.mouser.com) as part number
653-G2R-24-DC24. These are sealed relays and are not likely to fail again.

I mount the relay upside down to the circuit board with a strong double
sided tape. If you are careful, you can do this in a way that you can
run wires down to the PC board to make the 4 connections that you need
to make. For the relay power, you can use fairly thin (22 gage) wire.
For the Amp in and speaker out, I use 14 or 16 gage buss wire. PARALLEL
the 2 sections of the relay!!

The layout of the board is different for each channel, so you'll have
to be careful to figure out which side of the relay the wires have to
come off of. I suggest trial fitting several times before mounting the
relay, as I like to have the wires short as possible, both for the
signal path, and to have the wires hold the relay in position in case
the tape ever fails. Patience is the key. Expect this to take a couple
of hours.

Regards,
Tim Schwartz
Bristol Electronics