Make this my favourite ZX NUCLEON 512KB - clone Pentagon 128/512, Spectrum 128 - Assembled, Soldered and Tested PCB

Retro Computers >> Sinclair >> Sinclair ZX Spectrum >> Hardware >> General / Add-Ons
Listing type:
Fixed Price Multiple Items
Item Condition:
Seller location:
Karlovy Vary, Drahovice, Czech Republic
Ending in:
This listing is closed (27/11/2019)

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Latest buyer:
h***y (41)
Fixed price:
$144.50 USD
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Number Sold:
5 (View history)
Buyer Value Date and hour Quantity bought
h***y (41) $144.50 USD 26/11/2019  15:57:05 1
b***9 (8) $148.00 USD 10/11/2019  12:27:53 1
c***t (36) $144.95 USD 01/11/2019  18:12:45 1
I***s (12) $144.95 USD 01/11/2019  16:51:16 1
m***2 (0) $144.95 USD 27/10/2019  11:26:44 1

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 : 38725

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ZX NUCLEON 512KB - Pentagon (ZX Spectrum) clone

New version with improved picture quality!

Finished and tested PCB + SCART cable

Tested with DivIDE 2k14 (Lotharek version), DivMMC Lite (Bytedelight version), CSSs Delta Disk

ATTENTION! All orders will be because of overcrowding production capacity settled in early 2020.


ZX NUCLEON 512KB is a new clone of ZX Spectrum computer, respectively Pentagon 128KB/512KB computer. The motherboard is the same size as the ZX Spectrum 48KB computer board and will fit into his enclosure.

Electrical wiring is largely based on Pentagon 128KB/512KB computer and keeps timing important parts of the computer! ZX NUCLEON 512KB uses modern SRAM memory instead of historical dynamic RAM. There are also some minor modifications, bug fixes, and a better video part including RGB video output. The computer also contains a program sound generator AY-3-8910A.

Important improvements opposite all competing projects: All I / O signals between the CPU and the bus are amplified by drivers!
This means greater capabilities and reliability with connected external peripherals and CPU protection against damage.


Why buy ZX NUCLEON 512KB and not another, competitive project?

The vast majority of the best quality software from the 199x-20xx period comes from the countries of the ex-USSR. This software largely uses Pentagon timing and does not work on ZX Spectrum and its derivatives. That's why ZX NUCLEON is the best choice for the future.


Changes for version 2A:

The new version includes two changes:

1) Changing the video part for improved image quality - modified wiring and component values. ATTENTION IMPORTANT! Composite AV video signal completely removed, a new better S-VHS signal instead. RGB of course preserved :-)

2) New PCB color red


Link for documents download:


Thank you for your support and have a nice day :-) CSS Electronics

Overview photos, real PCB can be equipped with compatible components of other brands:

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Item Location:
Karlovy Vary, Drahovice, Czech Republic
Shipping conditions:
Buyer pays shipping expenses
Shipment fee:
  • To Czech Republic :
  • First Class Post : $8.00 USD For initial item, $1.00 USD Per additional item
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  • Airmail Post : $16.00 USD For initial item, $1.00 USD Per additional item
  • To Europe (Non EU) :
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  • To Americas (Non USA) :
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  • To Rest of World :
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  • To USA :
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