old hi fi gear
 

Would you suggest running this every so often to keep it going or just store
it away in an even temp dry place?

Old Rogers valve amp, JvC graphic equaliser old cassette deck etc.
Brian

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old hi fi gear
 

In article ,
Brian Gaff wrote:
Would you suggest running this every so often to keep it going or just store
it away in an even temp dry place?

Old Rogers valve amp, JvC graphic equaliser old cassette deck etc.

The Rogers amp may have some value - Ebay etc. The others likely not. So
it really depends on wether you might use any of them again.

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Dave Plowman London SW
To e-mail, change noise into sound.

old hi fi gear
 

In article , Dave Plowman (News)
wrote:

Old Rogers valve amp, JvC graphic equaliser old cassette deck etc.

The Rogers amp may have some value - Ebay etc. The others likely not. So
it really depends on wether you might use any of them again.

Well, the "old cassette deck" *might* be a high-end Nak. 8-]

Jim

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Audio Misc http://www.audiomisc.co.uk/index.html

old hi fi gear
 

"Brian Gaff" wrote in message
...
Would you suggest running this every so often to keep it going or
just store it away in an even temp dry place?

Old Rogers valve amp, JvC graphic equaliser old cassette deck etc.
Brian


Good idea to power up the amp every so often for a few hours to make
sure the reservoir caps don't dry out, otherwise keep it cool.



--
Woody

harrogate3 at ntlworld dot com

old hi fi gear
 

Woody wrote:



Good idea to power up the amp every so often for a few hours to make
sure the reservoir caps don't dry out, otherwise keep it cool.


** Electro caps lose their electrolyte constantly and the warmer they are the faster it happens. Small caps are the most vulnerable.

When left uncharged for long periods, a chemical reaction takes place called "depolarising" that both reduces the cap's vale and increases its capacitance. If this happens to a reservoir cap,it may overheat and explode when the item is switched on.

Depolarising can be prevented by running the equipment on a regular basis.

More importantly, running equipment for a few hours warms it up and drives out any moisture that has collected.


..... Phil

old hi fi gear
 

On Sat, 13 Feb 2016 14:56:10 +0000, Dave Plowman (News) wrote:

In article ,
Brian Gaff wrote:
Would you suggest running this every so often to keep it going or just
store it away in an even temp dry place?

Old Rogers valve amp, JvC graphic equaliser old cassette deck etc.

The Rogers amp may have some value - Ebay etc. The others likely not. So
it really depends on wether you might use any of them again.


The Rogers is almost certainly worth something, working or not. The cost
of decent mains and output transformers is silly now! I know, I've been
looking for some. :(

old hi fi gear
 

On Sat, 13 Feb 2016 15:32:37 -0800 (PST), Phil Allison
wrote:

Woody wrote:



Good idea to power up the amp every so often for a few hours to make
sure the reservoir caps don't dry out, otherwise keep it cool.


** Electro caps lose their electrolyte constantly and the warmer they are the faster it happens. Small caps are the most vulnerable.

When left uncharged for long periods, a chemical reaction takes place called "depolarising" that both reduces the cap's vale and increases its capacitance. If this happens to a reservoir cap,it may overheat and explode when the item is switched on.

Depolarising can be prevented by running the equipment on a regular basis.

More importantly, running equipment for a few hours warms it up and drives out any moisture that has collected.


.... Phil

The equation I use as a rule of thumb for calculating electrolytic
lifetime is Life = L1 *(Vo/Vr)*2^((Tm-(Ta-delta T))/10)

L1 is the specified lifetime. Vo and Vr are the operating and rated
voltages. Tm is the maximum rated temperature, Ta is the local ambient
temp and delta T is the internal rise caused by ripple current.

Applied to a single cap in a single bit of kit, this is essentially
meaningless, but over a few thousand it will give you something close
to the lower 3 Sigma point.

d

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old hi fi gear
 

No its not, there are three. Technics very large one used by talking
newspaper, Sharp budget deck, and I also have a Denon here with three heads
that seems to always be suffering from speed issues due to poor grip on its
capstans.
None are usable by me as I cannot see the meters any more. Using an old dbx
technics to convert some recordings to cd.
The denon also has a plastic washer missing from its feed spool as eject
eventually knocks it off, its been through three.
The equaliser is a JVC sea10, with five ganged sliders. the rogers is a
cadet 2, with supposedly 12.5 watts a channel, but it sounds a lot louder
to me. the front din socket is worn, it needs a new scratch and rumble
filter set of caps, the mains lead is damaged but not dangerous, the on off
switch inside the volume pot is held together with sticky tape. the two rear
power sockets are as standard and dangerous of course. It has two phono
input plugs one normal magnetic, one set for the deram ceramic.

I don't think elf and safety were as prominent in those days..:-)
Brian

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"Jim Lesurf" wrote in message
...
In article , Dave Plowman (News)
wrote:

Old Rogers valve amp, JvC graphic equaliser old cassette deck etc.

The Rogers amp may have some value - Ebay etc. The others likely not. So
it really depends on wether you might use any of them again.

Well, the "old cassette deck" *might* be a high-end Nak. 8-]

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics
http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

old hi fi gear
 

In article om,
mick wrote:
On Sat, 13 Feb 2016 14:56:10 +0000, Dave Plowman (News) wrote:

In article ,
Brian Gaff wrote:
Would you suggest running this every so often to keep it going or just
store it away in an even temp dry place?

Old Rogers valve amp, JvC graphic equaliser old cassette deck etc.

The Rogers amp may have some value - Ebay etc. The others likely not. So
it really depends on wether you might use any of them again.


The Rogers is almost certainly worth something, working or not. The cost
of decent mains and output transformers is silly now! I know, I've been
looking for some. :(

I did have one ages ago. Competent enough amp, although rather noisy by
modern standards. But totally outclassed by loads of later budget
transistor amps.

I can more understand using Quad or Radford etc valve amps on show as a
talking point. ;-)

--
*If at first you don't succeed, destroy all evidence that you tried *

Dave Plowman London SW
To e-mail, change noise into sound.

old hi fi gear
 

On Saturday, February 13, 2016 at 12:47:54 PM UTC, Brian Gaff wrote:
Would you suggest running this every so often to keep it going or just store
it away in an even temp dry place?

Old Rogers valve amp, JvC graphic equaliser old cassette deck etc.
Brian

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