Make this my favourite ZX Spectrum 4116 (lower RAM) replacement module.

Category:
Retro Computers >> Sinclair >> Sinclair ZX Spectrum >> Hardware >> General / Add-Ons
Listing type:
Fixed Price Multiple Items
Item Condition:
New
Seller location:
Reading, Berkshire, United Kingdom
Ending in:
This listing is closed (27/06/2020)

Notify When Back in Stock
Quantity Available
28
Latest buyer:
T***B (0)
Fixed price:
£13.08
Shipping Costs:
Free delivery available
Payment methods:
Paypal, Bank transfer
Number Sold:
89 (View history)
Buyer Value Date and hour Quantity bought
T***B (0) £13.08 11/04/2020  22:07:22 1
i***h (0) £13.08 01/03/2020  14:41:51 1
m***0 (9) £13.08 26/02/2020  20:26:47 1
c***s (4) £13.08 24/02/2020  09:29:57 1
w***7 (10) £26.16 24/01/2020  16:06:54 2
J***8 (1) £13.08 02/12/2019  06:29:20 1
e***i (23) £13.08 29/09/2019  16:23:45 1
S***n (2) £13.08 30/08/2019  19:04:49 1
p***o (4) £26.16 01/07/2019  11:58:39 2
S***0 (0) £13.08 27/06/2019  19:08:34 1
J***y (4) £13.08 25/06/2019  10:38:45 1
J***y (4) £13.08 05/06/2019  10:24:18 1
h***k (2) £26.16 15/05/2019  19:39:21 2
m***4 (2) £13.08 25/04/2019  16:45:58 1
A***3 (2) £13.08 18/03/2019  17:42:53 1
g***e (18) £39.24 27/02/2019  07:45:57 3
K***1 (1) £13.08 16/02/2019  12:53:03 1
K***1 (1) £13.08 03/02/2019  16:06:24 1
C***d (0) £13.08 26/01/2019  10:15:51 1
c***d (2) £13.08 19/01/2019  00:00:19 1
G***n (5) £13.08 27/11/2018  18:20:27 1
w***7 (10) £13.08 06/11/2018  10:10:02 1
A***a (0) £12.00 09/05/2018  07:44:16 1
a***o (24) £12.00 06/04/2018  20:10:56 1
h***9 (7) £12.00 13/01/2018  01:07:28 1
P***s (84) £12.00 21/09/2017  13:08:31 1
p***n (1) £24.00 02/09/2017  23:36:41 2
a***9 (5) £24.00 25/06/2017  17:36:39 2
A***7 (13) £12.00 19/06/2017  19:30:51 1
B***r (0) £12.00 11/05/2017  22:52:26 1
b***r (4) £12.00 30/04/2017  19:04:21 1
m***k (0) £24.00 03/04/2017  13:10:18 2
s***r (1) £12.00 19/03/2017  16:15:44 1
M***G (0) £12.00 09/03/2017  09:03:05 1
h***y (41) £24.00 31/12/2016  08:53:47 2
T***E (3) £24.00 31/10/2016  23:41:57 2
e***2 (7) £36.00 24/10/2016  00:08:05 3
c***s (4) £12.00 04/09/2016  22:30:10 1
m***e (3) £12.00 15/12/2015  22:23:06 1
l***a (4) £36.00 01/09/2015  09:58:03 3
H***y (20) £24.00 30/08/2015  03:28:16 2
s***t (8) £12.00 07/06/2015  16:38:05 1
b***h (10) £12.00 06/05/2015  15:23:46 1
c***3 (34) £12.00 10/02/2015  19:09:46 1
J***i (35) £24.00 03/02/2015  17:14:33 2
A***y (2) £12.00 15/01/2015  18:59:40 1
z***r (8) £12.00 05/01/2015  21:52:36 1
j***n (5) £12.00 16/12/2014  19:19:10 1
j***7 (0) £12.00 09/12/2014  19:01:54 1
j***s (19) £12.00 30/11/2014  20:03:15 1
d***e (8) £12.00 06/10/2014  08:11:11 1
A***h (8) £24.00 25/09/2014  12:21:44 2
E***9 (20) £12.00 19/09/2014  23:58:53 1
h***p (0) £12.00 03/09/2014  21:23:15 1
v***y (6) £12.00 25/08/2014  11:47:58 1
a***y (2) £12.00 27/07/2014  09:35:11 1
E***9 (20) £12.00 24/07/2014  11:45:39 1
z***g (4) £12.00 09/06/2014  23:56:55 1
D***l (0) £12.00 20/05/2014  12:41:44 1
b***t (2) £12.00 18/04/2014  17:16:59 1
k***r (4) £24.00 30/03/2014  21:30:39 2
S***z (0) £12.00 18/03/2014  04:22:08 1
Z***g (9) £12.00 15/01/2014  16:52:42 1
y***o (30) £12.00 10/12/2013  22:00:43 1
v***t (7) £24.00 23/11/2013  22:58:19 2
n***k (3) £24.00 25/10/2013  10:40:58 2
w***7 (10) £12.00 12/08/2013  16:05:42 1
f***g (9) £24.00 13/06/2013  23:12:30 2
Feedback on this Item
PositivePositive m***0 (9) Excellent service, thanks 05/03/2020  20:17:39
PositivePositive J***8 (1) The module has arrived and works fine. Recommended. Thanks 20/01/2020  13:36:50
PositivePositive S***n (2) Everything perfect! Recommended. Thank you! 13/09/2019  19:21:08
PositivePositive p***o (4) ok, very nice 13/07/2019  11:32:53
PositivePositive h***k (2) Great Many Thanks 22/05/2019  13:28:51
PositivePositive m***4 (2) All OK. Module works as intended. Thanks. 14/09/2019  18:54:01
PositivePositive A***3 (2) The shield work perfectly! 04/04/2019  21:37:27
PositivePositive g***e (18) Thank you zxzigg. Shipped quickly. Great seller! 08/03/2019  17:46:21
PositivePositive K***1 (1) Superb little item, worked perfect and a little old Spectrum is back to life. Thank you! 09/02/2019  20:31:57
PositivePositive c***d (2) well packaged and works great. Thanks 17/02/2019  01:20:06
PositivePositive a***o (24) Perfect. High quality! 18/04/2018  23:36:19
PositivePositive p***n (1) 16/09/2017  11:55:24
PositivePositive b***r (4) arrived fast along with the upper RAM, and working perfectly 20/05/2017  13:41:08
PositivePositive c***s (4) Great seller. A++. 15/09/2016  14:09:55
PositivePositive l***a (4) Fast and accurate shipping, thanks! 11/09/2015  17:01:39
PositivePositive H***y (20) Excellent, Thanks :) 09/09/2015  00:24:06
PositivePositive s***t (8) 24/09/2017  23:47:59
PositivePositive b***h (10) got it, thanks! 22/05/2015  19:13:52
PositivePositive c***3 (34) Transaction Parfaite !!!! Merci ! 20/02/2015  21:15:22
PositivePositive A***y (2) Very good lower RAM replacement. Works perfectly. Shipping to Slovenia (part of EU) was fast. Good seller, which I recommend. 01/02/2015  08:52:32
PositivePositive z***r (8) Thanks, I received the item quickly. 21/01/2015  13:39:14
PositivePositive A***h (8) Perfect. Worked a treat. Many thanks =) 24/10/2014  06:54:08
PositivePositive v***y (6) 08/07/2015  12:42:29
PositivePositive a***y (2) 15/09/2014  23:05:49
PositivePositive b***t (2) GOOD transaction, FAST service, GREAT seller. Thanks!!! 5***** 25/05/2015  10:09:54
PositivePositive Z***g (9) Execllent seller, I am very pleased with vram module, thank you! 23/01/2014  14:35:04
PositivePositive y***o (30) Received with thanks! 13/01/2014  01:49:25
PositivePositive w***7 (10) bonne transaction 27/09/2013  21:22:28

WARNING: Due to the impact of coronavirus, delivery times across the World are severely impacted, with some countries refusing to accept postage completely.

Item Number : 2741

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zxzigg (67) User Offline

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Description

AT THIS TIME ONLY ORDERS FOR SHIPPING TO ADDRESSES IN THE UNITED KINGDOM CAN BE ACCEPTED.

The lower 16K of RAM in 48K (and 16K) ZX Spectrum computers is provided by eight 4116 DRAM ICs. It is common for these to fail through simple old age or due to other faults in the computer, in particular failure of the circuit that generates the multiple power supply voltages needed by the 4116s. It is also quite likely that at least some of the 4116s will be damaged should a device be connected to or unplugged from the Spectrum's expansion connector while the power is turned on or if such a device is improperly plugged in (something that is very easy to do). New old stock and used 4116s are available, but they are probably at least thirty years old and there is little reason to think they will be more reliable than those they are used to replace.

The ZX Spectrum lower RAM replacement module is a device that replaces all eight 4116s in a 48K or 16K ZX Spectrum (it cannot be used with any of the 128K models). It uses a modern SRAM IC and is far less likely to be damaged in the situations described above. Another, smaller, advantage is that it consumes less power than the 4116s and so the heat generated inside the computer is reduced, mainly due to the lower current through the 7805 voltage regulator. The module can be inserted into standard DIL sockets (it is not a good fit for turned-pin style sockets) fitted in place of the 4116s or it can be soldered directly to a Spectrum's circuit board, once the 4116s have been carefully removed. No other alterations need to be made to the computer. From the point of view of software running on the ZX Spectrum, the computer's operation is unaltered by the presence of the module and it should not be detectable.

Click here for installation instructions.

Delivery: Price includes delivery to UK and associated postal regions. Postage to anywhere else is £2.80 extra for up to 3 modules. Please contact for a quote if you want to purchase more than 3.

Payment: PayPal or transfer of the exact amount to a UK bank account accepted. Account details will be sent on request.

Compatibility note: It is anticipated a ZX Spectrum with a 5C102E ULA will not function properly if fitted with this module. Feedback suggests the same problem affects not more than 1% of ZX Spectrums that have a 5C112E ULA. No later versions of the ULA are known to be in any way incompatible. In cases where this incompatibility occurs, corruption of the display is apparent, but the computer otherwise functions normally. The problem might be cured by replacing resistors R17 - R23 with ones of slightly higher resistance, but this has not been tested. Note that exactly the same symptoms can occur because of a faulty ULA, regardless of the type of lower RAM installed. No such compatibility problems are known the affect the upper RAM module.

Picture gallery

  • ZX Spectrum 4116 (lower RAM) replacement module.
  • ZX Spectrum 4116 (lower RAM) replacement module.
  • ZX Spectrum 4116 (lower RAM) replacement module.

Questions and Answers

  • Question: The Timex Sinclair 1500 (version of the ZX81 in a Spectrum style case) has a similar row of 4116 4NS chips providing 16K of memory built in. Do you think this module might work with them too?

    Posted by G***n (5) - 27/11/2018  15:58:45

    Answer: I haven't got a TS1500 to carry out any tests on, but I think it likely the circuit would work. However, I believe the spacing between the 4116 ICs in this computer is greater and so the ZX Spectrum RAM module would not fit directly.

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Shipping and Payment

Item Location:
Reading, Berkshire, United Kingdom
Shipping conditions:
Buyer pays shipping expenses
Shipment fee:
  • To United Kingdom :
  • First Class Post : FREE
  • Second Class Post : FREE
Shipment terms:
Not specified
Payment methods:
Paypal, Bank transfer

The seller accepts all responsibility for this listing

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