TS 430 Memory Battery

Discussion in 'General Technical Questions and Answers' started by N2CFT, May 5, 2012.

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  1. N2CFT

    N2CFT Ham Member QRZ Page

    Have a 30 year old Kenwood TS 430s that still has the original memory battery. Wondering what others have experienced?
  2. W9GB

    W9GB Ham Member QRZ Page

    In 2005, I picked up a Kenwood TS-440S from an estate. That lithium coin cell still maintained the radio memory, BUT I desired to replace that battery as part of normal maintenance. These batteries were expected to have a 10 year life, typically.
    When I opened the radio and looked at the front panel control board --- that coin cell battery had started to LEAK !!
    Fortunately, it cleaned up (using standard methods) and no damage had occurred to copper traces or discrete components.

    Kenwood TS-430S Owners -- Yahoo Group

    Amateur Repairs -- Yahoo Group
    Last edited: May 5, 2012
  3. K8ERV

    K8ERV Ham Member QRZ Page

    You didn't say if it worked.

    TOM K8ERV Montrose Colo
  4. N2CFT

    N2CFT Ham Member QRZ Page

    Yes, the battery works. Is it difficult to replace and where is it?

  5. W9GB

    W9GB Ham Member QRZ Page

    John -

    This is not a 5 minute replacement.

    1. Here is my QRZ information posting for Kenwood TS-440S battery replacement

    2. The TS-430S lithium coin cell is a SOLDER-TAB battery, requiring soldering skills.
    The original battery is a CR2032 with Solder Tabs spot welded on to it, and is on the control unit board on the coax connector side. The TS-430S Control Unit Board is underneath the IF board, accessed from the top of the radio by removing the two screws holding the back of the IF board tray down and swinging it up towards the front of the radio.

    These solder tab batteries are no longer available from Kenwood Parts (End-of-Life product).
    You can order from Digi-Key OR take the old battery to a Batteries Plus retail store.
    Batteries Plu retail stores have the spot weld equipment to make that coin cell on premise
    (normally at NO extra charge).

    3. It is best to have the TS-430S Service Manual with its pictorial diagrams for proper disassembly,
    and which screws are required to be removed.

    Good Luck.

    Earlier QRZ and eHam.net questions about TS-430S battery replacement



    MODS.DK on TS-440S

    Last edited: May 5, 2012
  6. K8ERV

    K8ERV Ham Member QRZ Page

    I tried to d/l the file just for my files, said I did not have permission. I hate that. It either is, or is not available. Bummer.

    TOM K8ERV Montrose Colo
  7. N2CFT

    N2CFT Ham Member QRZ Page

    thanks...good information
  8. G0HZU

    G0HZU QRZ Member

    Yes, me too! I bought my TS430S new in around 1984/5 and it still has the original memory battery and the memories still work! The radio sat unused in its box in the loft for about 5 years in the 1990s and I was amazed back then that the memory battery was still functional. But here we are 15 years later and it is STILL functional!
  9. AE7AD

    AE7AD Premium Subscriber QRZ Page

    I just After 22 years .replaced the Battery on My TS440. BUT i used a battery holder with long leads and put it in a safe place with double face tape now if i need to change it i just snap one in..I found out a year or so ago that the newer 2032 battery do NOT last as long as the older ones did.
  10. G0GQK

    G0GQK Ham Member QRZ Page

    I also have a TS 430 which I bought in 1986 used with the same battery and all the frequencies are still there, and I haven't any idea where this battery is located. They don't make 'em like this any more, the 746 was crap in comparison, I've had everything, black screen etc. Krappo !
  11. W9GB

    W9GB Ham Member QRZ Page

    Coin-type lithium batteries (Sanyo; Panasonic) are available in two types:

    Poly-carbonmonofluoride lithium (BR series): For uses that require extended reliability and safety.
    The BR series batteries are for applications exposed to extended temperature ranges and harsh operating conditions - operational temperature range: -40°C (-40°F) ~ 125°C (257°F). This series has excellent leakage resistance and is commonly found in automotive electric systems; tollway transponders and RFID units.
    Manganese dioxide lithium (CR series): For uses that require high voltage and strong load pulse characteristics. The CR series batteries have a temperature range of -30ºC ~ +60ºC.
    This series is used for high voltage requirements and strong load pulse characteristics. These are commonly found in memory back-up applications (with tab terminals), cameras, watches and calculators.

    The specific battery that Kenwood uses (W09-0326-05) is a Sanyo CR2032 battery with solder tabs - Panasonic CR2032/1F2 is equivalent to the Sanyo.
    The 1F2 suffix is the ID designation for the 7 mm solder tabs horizontal to the battery and with insulation wrap (yellow).
    This battery is rated at 220 mAh and easily fits the 35mm spacing between the PC board connections.

    Digi-Key sells the BR version.
    Digi-Key: P223-ND
    Panasonic/Sanyo: BR-2032-1F2


    Bill Leahy, K0ZL (sk) battery replacement instructions list DigiKey part number P025-ND as an alternative battery. This battery is shown in the photos of his replacement instructions.
    This battery is actually Panasonic BR2330A/FA.
    The FA suffix is the ID designation for a 7 mm and 5 mm solder tab horizontal to the battery with insulation wrap (lime green).
    This battery is rated at 255mAh and fits 35 mm spacing between the PC board connections.

    Digi-Key: P025-ND
    Panasonic/Sanyo: BR-2330A/FAN

    Last edited: May 6, 2012
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