1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Where we are now: The site is back up and running! The character set encoding issue has been fixed so old posts should now look ok. I am currently working on themes/skins etc and I will be deleting the temporary green skin very soon as it has many issues. I will do a very quick variation on the stock blue skin first just to get a light-grey background and san-serif font, and I will set this as default. Later this week I will hopefully add a professional third-party skin in pfm colours (life is way too short to do this crap myself, and I've found one I really like than needs next to no tweaking). We are getting there slowly...
    Dismiss Notice
  3. May I please request people check and update their email address if it is out if date. I ask as I’m getting countless bounce errors as the server fails to send notifications through etc. I’ll eventually figure out how to send these to a black hole somewhere, but it makes sense to address it at source as quite a few folk are obviously not getting the thread and conversations notifications they have set in their preferences.
    Dismiss Notice
  4. Things you need to know about the new ‘Conversations’ PM system:

    a) DO NOT REPLY TO THE NOTIFICATION EMAIL! I get them, not the intended recipient. I get a lot of them and I do not want them! It is just a notification, log into the site and reply from there.

    b) To delete old conversations use the ‘Leave conversation’ option. This is just delete by another name.
    Dismiss Notice

[FS] NAP110 parts including H & F transformers, NAPA boards & PSU modules

Discussion in 'd.i.y. classifieds' started by misterc6, Nov 10, 2017.

  1. misterc6

    misterc6 What's he building in there?

    This is a unique opportunity to buy some sought after parts from which you could make a pair of NAP110 mono amplifiers; or a dual mono NAP160/NAP180 type amplifier or a number of other possibilities. Due to the rarity of some of these items prices are non-negotiable unless you want to buy everything listed here. I may split the items so please express any interest you may have but accept that I may wait to get a buyer/buyers for everything. Shipping will be extra at cost.

    [​IMG]IMG_0058 by Malcolm Connah, on Flickr

    2 off Holden & Fisher NAP110 transformers probably from the early 1980s £85 each

    1 pair of NAPA 5/4 amplifier boards, SOA removed, tantalum capacitors replaced £110

    1 off NAPS140/1 PSU module from a NAP110 with capacitors dating from 1988 £25

    1 off NAPS140/3 PSU module from a NAP140 with capacitors dating from 1993 £25

    8 off Vishay 10,000 uF, 50V, 105 deg used in my amplifiers for about 6 months £3.75 each

    NB price in the link below does not include 20% VAT
    Last edited: Nov 10, 2017
  2. pm1961

    pm1961 pfm Member

    I know you said "non-negotiable"........ However.............

    FWIW, I am offering £200 for the amp boards and the transformers.

    Did you break the transformers down yourself? Can you confirm you've drawn current through them and they're non-hummers?


  3. misterc6

    misterc6 What's he building in there?

    My electricity supply here is awful and averages 248v which has given me hum problems in the past with inferior mains transformers.

    These two transformers came to me in two NAP110 amplifiers that I bought earlier this year from a friend and fellow fish. One of the amplifiers had been through my hands previously for service. I initially converted them to a pair of 110 mono amplifiers fitting them with Avondale 110 power supply modules and selling one of the pairs of NAPA boards. I then had the opportunity of building one of the first pairs of Avondale QUDOS (NCC220) amplifier boards which I fitted in place of the Naim NAPA 5/4 boards. Knowing, from previous experience, that Avondale amplifier boards benefit from higher voltage rails than those present in the NAP110s I specified some new transformers from Canterbury Windings which I fitted in place of the H & F ones that I'm now selling. Some of the history of this project can be seen in these threads:



    Yes, I removed the transformers from the 110s myself.
    Yes, before removing them in October the transformers were in almost daily use by myself for most of this year.
    Yes, I can confirm that, whilst I have had them I have had no problems with hum.

    I won't be accepting your offer but will now sell all the items separately should that be of interest to other potential buyers.

    Thanks for your interest.
  4. pm1961

    pm1961 pfm Member

    Thanks for the detailed reply.


Share This Page