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Vintage Synth Repair

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Needs some chips: 4011 and TC5501P-1

Needs some chips: 4011 and TC5501P-1

2010-09-10 by rakky

I'm about to start mucking about with a few old drum machines (DR-55s, Soundmasters and EDC). These were considered uneconomic to fix, 5 years ago. Now, a DR-55 can go for £200..

Usual problem with DR-55s is the 4011 chips pack up. Maplins are charging nearly a quid for a 4011, and I've found them to be a bit hit-or-miss. And they don't have any in stock locally. 
Anyone have a suggestion for a cheap UK supplier?

Next-up, I have at least one machine which is playing-up as if the RAM chip is duff. Unfortunately, the chip is a Toshiba TC5501P-1.
Again, any suggestions for a cheap UK supplier?

What's really annoying is that I had a tube of 4011s somewhere (5 years ago). Can I hell find them :(

Re: [vintagesynthrepair] Needs some chips: 4011 and TC5501P-1

2010-09-10 by Philip

I source all my IC's off ebay usually.

5501 ram is the same as 5101 ram which is plentiful also used in tons of 
Williams pinballs and video games.





________________________________
Show quoted textHide quoted text
From: rakky <pargroups@...>
To: vintagesynthrepair@yahoogroups.com
Sent: Fri, 10 September, 2010 11:13:54
Subject: [vintagesynthrepair] Needs some chips: 4011 and TC5501P-1

  
I'm about to start mucking about with a few old drum machines (DR-55s, 
Soundmasters and EDC). These were considered uneconomic to fix, 5 years ago. 
Now, a DR-55 can go for £200..

Usual problem with DR-55s is the 4011 chips pack up. Maplins are charging nearly 
a quid for a 4011, and I've found them to be a bit hit-or-miss. And they don't 
have any in stock locally. 

Anyone have a suggestion for a cheap UK supplier?

Next-up, I have at least one machine which is playing-up as if the RAM chip is 
duff. Unfortunately, the chip is a Toshiba TC5501P-1.
Again, any suggestions for a cheap UK supplier?

What's really annoying is that I had a tube of 4011s somewhere (5 years ago). 
Can I hell find them :(

Re: Needs some chips: 4011 and TC5501P-1

2010-09-10 by nervejam

I can see listings for tubes of 4011s, £6.49 for 20, etc
No tc5501 anywhere, or 5101 either..

--- In vintagesynthrepair@yahoogroups.com, Philip <eggwheatis@...> wrote:
Show quoted textHide quoted text
>
> I source all my IC's off ebay usually.
> 
> 5501 ram is the same as 5101 ram which is plentiful also used in tons of 
> Williams pinballs and video games.
> 
> 
> 
> 
> 
> ________________________________
> From: rakky <pargroups@...>
> To: vintagesynthrepair@yahoogroups.com
> Sent: Fri, 10 September, 2010 11:13:54
> Subject: [vintagesynthrepair] Needs some chips: 4011 and TC5501P-1
> 
>   
> I'm about to start mucking about with a few old drum machines (DR-55s, 
> Soundmasters and EDC). These were considered uneconomic to fix, 5 years ago. 
> Now, a DR-55 can go for £200..
> 
> Usual problem with DR-55s is the 4011 chips pack up. Maplins are charging nearly 
> a quid for a 4011, and I've found them to be a bit hit-or-miss. And they don't 
> have any in stock locally. 
> 
> Anyone have a suggestion for a cheap UK supplier?
> 
> Next-up, I have at least one machine which is playing-up as if the RAM chip is 
> duff. Unfortunately, the chip is a Toshiba TC5501P-1.
> Again, any suggestions for a cheap UK supplier?
> 
> What's really annoying is that I had a tube of 4011s somewhere (5 years ago). 
> Can I hell find them :(
>

Re: Needs some chips: 4011 and TC5501P-1

2010-09-10 by Scott

--- In vintagesynthrepair@yahoogroups.com, "rakky" <pargroups@...> wrote:
>
> I'm about to start mucking about with a few old drum machines (DR-55s, Soundmasters and EDC). These were considered uneconomic to fix, 5 years ago. Now, a DR-55 can go for £200..
> 
> Usual problem with DR-55s is the 4011 chips pack up. Maplins are charging nearly a quid for a 4011, and I've found them to be a bit hit-or-miss. And they don't have any in stock locally. 
> Anyone have a suggestion for a cheap UK supplier?
> 
> Next-up, I have at least one machine which is playing-up as if the RAM chip is duff. Unfortunately, the chip is a Toshiba TC5501P-1.
> Again, any suggestions for a cheap UK supplier?
> 
> What's really annoying is that I had a tube of 4011s somewhere (5 years ago). Can I hell find them :(
>

The 4011 is a CMOS IC...Very common

Try Farnell

The TC5501 is a 256 Word x 4 bit memory chip..Vintage  

Try Ebay for that one

Re: Needs some chips: 4011 and TC5501P-1

2010-09-10 by Todd

Maybe try here:

http://www.dalbani.co.uk/catalogue/product_details.php?id=24954

http://www.dalbani.co.uk/catalogue/product_details.php?id=7247

-TF

--- In vintagesynthrepair@yahoogroups.com, "nervejam" <paul.rak@...> wrote:
Show quoted textHide quoted text
>
> I can see listings for tubes of 4011s, £6.49 for 20, etc
> No tc5501 anywhere, or 5101 either..
> 
> --- In vintagesynthrepair@yahoogroups.com, Philip <eggwheatis@> wrote:
> >
> > I source all my IC's off ebay usually.
> > 
> > 5501 ram is the same as 5101 ram which is plentiful also used in tons of 
> > Williams pinballs and video games.
> > 
> > 
> > 
> > 
> > 
> > ________________________________
> > From: rakky <pargroups@>
> > To: vintagesynthrepair@yahoogroups.com
> > Sent: Fri, 10 September, 2010 11:13:54
> > Subject: [vintagesynthrepair] Needs some chips: 4011 and TC5501P-1
> > 
> >   
> > I'm about to start mucking about with a few old drum machines (DR-55s, 
> > Soundmasters and EDC). These were considered uneconomic to fix, 5 years ago. 
> > Now, a DR-55 can go for £200..
> > 
> > Usual problem with DR-55s is the 4011 chips pack up. Maplins are charging nearly 
> > a quid for a 4011, and I've found them to be a bit hit-or-miss. And they don't 
> > have any in stock locally. 
> > 
> > Anyone have a suggestion for a cheap UK supplier?
> > 
> > Next-up, I have at least one machine which is playing-up as if the RAM chip is 
> > duff. Unfortunately, the chip is a Toshiba TC5501P-1.
> > Again, any suggestions for a cheap UK supplier?
> > 
> > What's really annoying is that I had a tube of 4011s somewhere (5 years ago). 
> > Can I hell find them :(
> >
>

Re: Needs some chips: 4011 and TC5501P-1

2010-09-10 by nervejam

Jackpot! Thanks for the tip.

--- In vintagesynthrepair@yahoogroups.com, "Todd" <babysealclub@...> wrote:
Show quoted textHide quoted text
>
> Maybe try here:
> 
> http://www.dalbani.co.uk/catalogue/product_details.php?id=24954
> 
> http://www.dalbani.co.uk/catalogue/product_details.php?id=7247
> 
> -TF
> 
> --- In vintagesynthrepair@yahoogroups.com, "nervejam" <paul.rak@> wrote:
> >
> > I can see listings for tubes of 4011s, £6.49 for 20, etc
> > No tc5501 anywhere, or 5101 either..
> > 
> > --- In vintagesynthrepair@yahoogroups.com, Philip <eggwheatis@> wrote:
> > >
> > > I source all my IC's off ebay usually.
> > > 
> > > 5501 ram is the same as 5101 ram which is plentiful also used in tons of 
> > > Williams pinballs and video games.
> > > 
> > > 
> > > 
> > > 
> > > 
> > > ________________________________
> > > From: rakky <pargroups@>
> > > To: vintagesynthrepair@yahoogroups.com
> > > Sent: Fri, 10 September, 2010 11:13:54
> > > Subject: [vintagesynthrepair] Needs some chips: 4011 and TC5501P-1
> > > 
> > >   
> > > I'm about to start mucking about with a few old drum machines (DR-55s, 
> > > Soundmasters and EDC). These were considered uneconomic to fix, 5 years ago. 
> > > Now, a DR-55 can go for £200..
> > > 
> > > Usual problem with DR-55s is the 4011 chips pack up. Maplins are charging nearly 
> > > a quid for a 4011, and I've found them to be a bit hit-or-miss. And they don't 
> > > have any in stock locally. 
> > > 
> > > Anyone have a suggestion for a cheap UK supplier?
> > > 
> > > Next-up, I have at least one machine which is playing-up as if the RAM chip is 
> > > duff. Unfortunately, the chip is a Toshiba TC5501P-1.
> > > Again, any suggestions for a cheap UK supplier?
> > > 
> > > What's really annoying is that I had a tube of 4011s somewhere (5 years ago). 
> > > Can I hell find them :(
> > >
> >
>

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