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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:
10 days, 22h:36m:56s
Quantity Available
57
Latest buyer:
P***s (74)
Fixed price:
£12.00 Buy now!
Number Sold:
59 (View history)
Buyer Value Date and hour Quantity bought
P***s (74) £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 (3) £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 (24) £24.00 31/12/2016 08:53:47 2
T***E (0) £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 (7) £12.00 07/06/2015 16:38:05 1
b***h (10) £12.00 06/05/2015 15:23:46 1
c***3 (31) £12.00 10/02/2015 19:09:46 1
J***i (28) £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 (0) £12.00 16/12/2014 19:19:10 1
j***7 (0) £12.00 09/12/2014 19:01:54 1
j***s (14) £12.00 30/11/2014 20:03:15 1
d***e (5) £12.00 06/10/2014 08:11:11 1
A***h (8) £24.00 25/09/2014 12:21:44 2
E***2 (7) £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***2 (7) £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 (8) £12.00 15/01/2014 16:52:42 1
y***o (29) £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 (4) £12.00 12/08/2013 16:05:42 1
f***g (9) £24.00 13/06/2013 23:12:30 2
Shipping Costs:
Free delivery available
Payment methods:
Paypal, Bank transfer
Feedback on this Item
PositivePositive p***n (1) 16/09/2017 11:55:24
PositivePositive b***r (3) 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 (7) 24/09/2017 23:47:59
PositivePositive b***h (10) got it, thanks! 22/05/2015 19:13:52
PositivePositive c***3 (31) 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 (8) Execllent seller, I am very pleased with vram module, thank you! 23/01/2014 14:35:04
PositivePositive y***o (29) Received with thanks! 13/01/2014 01:49:25
PositivePositive w***7 (4) bonne transaction 27/09/2013 21:22:28

Item Number : 2741

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zxzigg (34) User Offline

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Fixed price: £12.00
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Description

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 £2.70 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.

ZX Spectrum upper RAM module: This module is also on sale at this site at the same price and orders of the two types can be combined. If you wish to make a mixed purchase, please select one type only and place an order for the total number of modules you want and then send a message saying how many of each type you want. For example, to purchase one upper RAM and one lower RAM module, place an order for two lower RAM modules and send a message stating that you want one of each type instead.

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

Shipping and Payment

Item Location:
Reading, Berkshire, United Kingdom
Shipping conditions:
Buyer pays shipping expenses
Shipment fee:
  • To United Kingdom :
  • Second Class Post : FREE
  • To EU :
  • Airmail Post : £2.70
  • To Rest of Europe :
  • Airmail Post : £2.70
  • To Americas :
  • Airmail Post : £2.70
  • To Rest of World :
  • Airmail Post : £2.70
Shipment terms:
Not specified
Payment methods:
Paypal, Bank transfer

The seller accepts all responsibility for this listing

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