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Author Topic: TS-850s memory batt. replacement-will it affect service menu?.  (Read 6772 times)
ZS5WC
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Posts: 412


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« on: July 10, 2013, 06:02:26 AM »

 Huh
When I replace the current memory batt. will I lose my service adjustments--like the carrier insertion points,etc.?.

Any Ideas?..

Also, increasing the 1 uF caps in the MIC. and Audio switch circuits to 10uF, will this give me slightly  better low frequency response on SSB?.
I however do realise that the ultimate bandwidth is limited by the Crystal Filter.

73 de William
ZS4L / ZS5WC
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KE3WD
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Posts: 5689




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« Reply #1 on: July 10, 2013, 06:44:19 AM »

Huh
When I replace the current memory batt. will I lose my service adjustments--like the carrier insertion points,etc.?.

Any Ideas?..

If the battery is replaced properly, you should not lose anything, provided that the rig wasn't left to deplete the original battery so low that it could not keep the memory. 

The circuits typically contain a capacitor (and often a diode blocker) that is there to keep the memory in enough voltage to allow for the memory cell changeout.  This means that we shouldn't remove the old battery from the circuit and then set the rig aside for any length of time, the new cell should be installed within a reasonable amount of time, but you don't have to rush this, either, there is typically plenty of time for you to solder in the new battery cell. 

Quote
Also, increasing the 1 uF caps in the MIC. and Audio switch circuits to 10uF, will this give me slightly  better low frequency response on SSB?.
I however do realise that the ultimate bandwidth is limited by the Crystal Filter.

73 de William
ZS4L / ZS5WC

I would tend to doubt it.  1uF at the typical impedance will likely pass about the same amount of low freq on as 10uF, considering the limited audio bandwidth to begin with, but if you really want to try it, I can't see it being a harmful thing, either.  Try it and see what YOU think. 

Installing an active Graphic Equalizer or small audio mixer with EQ/Tone controls on your Mic input, observing impedances in and out, might be more appropriate, but there is still the rather limited bandwidth of the mode here. 


73
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ZS5WC
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« Reply #2 on: July 16, 2013, 04:22:03 AM »

 :)Thanks for the reply Clark,

Will probably takle it this weekend, I also doubt if the 10uF caps will enhance the bass, but I note on one of the sites they do this to increase the AM fidilety.
I seriously doubt if the Filter will even pass anything below 300Hz.
Now top find a good DSP-100--Hi!.

73 de William
ZS4L
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N4NYY
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Posts: 4816




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« Reply #3 on: July 28, 2013, 06:58:45 AM »

:)Thanks for the reply Clark,

Will probably takle it this weekend, I also doubt if the 10uF caps will enhance the bass, but I note on one of the sites they do this to increase the AM fidilety.
I seriously doubt if the Filter will even pass anything below 300Hz.
Now top find a good DSP-100--Hi!.

73 de William
ZS4L

If those are CR2032 batteries or similar, I usually buy a battery socket and relocate the battery to a place much more easily accessible. Especially if it were a mobile rig, when they put them behind the keypanel.

If you are careful and good, you can swap the battery with the power on, this way you do not lose the settings. The problem with that is if it falls and shorts something. I have done it with CMOS batteries on PC towers with the power on, and gotten lucky.
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K1CJS
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« Reply #4 on: July 28, 2013, 07:49:31 AM »

Another possible method is to use another battery--2 AA cells in a holder with clamp on type test probes--the type that are spring loaded, you have to press to open up, and hold themselves closed with spring tension.  I think you can still buy the small ones at Rat Shack for a few bucks.

Simply grab the end of the wire near the circuit board and carefully disconnect and reconnect the memory battery, and when you're done just remove the test clamps from the wires.  Sure beats the heck out of reprogramming the memories!
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W9GB
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Posts: 2656




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« Reply #5 on: August 08, 2013, 07:48:05 AM »

Kenwood TS-850S battery replacement
http://www.aerog.com/ts850_battery.shtml

The original lithium coin cell battery in the TS-850S is the Sanyo CR2430-FT1 3V 270 mAH
Mouser Electronics stocks the battery as stock number 639-CR2430-FT1 for $2.30 USD.

Panasonic virtually controls the lithium coin cell market with its purchase of Sanyo, a few years ago.
FDK and FUJI are brand competitors.

BR-A Series Lithium Coin Cell Batteries (Datasheets, Digi-Key)
The GAN suffix for Panasonic coin cells appears to be same as FT1 (above),
LOOK at datasheet measurements to confirm.  A 23 mm coin cell w/tabs may also fit.
http://www.digikey.com/catalog/en/search?filters=19198

Panasonic Coin Type BR & CR Batteries (Panasonic product support page)
http://www.panasonic.com/industrial/batteries-oem/oem/primary-coin-cylindrical/br-cr.aspx

Panasonic BR (Coin) Series
http://www.digikey.com/catalog/en/partgroup/br-coin-series/3422
Panasonic CR (Coin) Series
http://www.digikey.com/catalog/en/partgroup/cr-coin-series/3437

The Solder tab Panasonic lithium coin cells at Digi-Key are typically $1.00 to $1.50 each, qty 1.
Used in RFID, toll way transponders, and automotive electric systems (black box computers).
Digi-Key has tens of thousands, of most popular sizes, IN STOCK
http://www.digikey.com/us/en/ph/panasonic/br-a.html

CR2430-FT1
http://www.alliedelec.com/catalog/pf.aspx?fn=919.pdf
Dissecting the Part Number or Meaning
==
CR - Lithium coin cell formulation, CR-series contains perchlorate.
(BR-A series poly (carbon monofluoride) lithium is other major type)
24 - Diameter of the Coin Cell (24.5), rounded to closest mm.
30 - Current Capacity of Coin Cell (270mAh), rounding of mAh times 10 (check data sheet)
FT1 - Suffix for Solder tab type, FT1 refers to 3-pin Horizontal PC mount (pin spacing in data sheets)

Dantona Industries, Inc.
Lithium coin Cells with PC Mount
Allied Electronics : Distributor
http://www.alliedelec.com/images/products/datasheets/bm/DANTONA_INDUSTRIES_INC/70157333.pdf

Batteries with Terminals - Panasonic/Sanyo
http://www.panasonic.com/industrial/includes/pdf/Panasonic_Lithium_Soldering.pdf

Design for Memory Back-Up Usage
http://www.panasonic.com/industrial/includes/pdf/Panasonic_Lithium_DesignMemoryBU.pdf

===
w9gb
« Last Edit: August 08, 2013, 08:20:20 AM by W9GB » Logged
KA5IPF
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« Reply #6 on: August 08, 2013, 09:03:56 AM »

W9GB, with your permission I would like to add your notes on the 850 battery to the database on the Yahoo group for the 450/850. Or you could post it there. I was recently asked where to get the batteries and gave a much abbreviated answer.

Clif
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W9GB
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Posts: 2656




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« Reply #7 on: August 08, 2013, 09:38:11 AM »

Clif,

Feel free to post to the Kenwood 450/850 Yahoo Group.

Scott Keating, N4GVA provided the first web page link.
The remainder are updates from my previous QRZ and eham.net postings on topic since 2009.

The more informed the amateur radio community becomes, the better.
« Last Edit: August 08, 2013, 09:47:09 AM by W9GB » Logged
W9GB
Member

Posts: 2656




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« Reply #8 on: August 08, 2013, 09:59:53 AM »

LIHIUM COIN CELL HOLDERS
http://memoryprotectiondevices.com/
====
The first coin cell battery holder made for general PCB placement was invented and patented by Memory Protection Devices, Inc. (MPD) in 1983, and since then we have been modernizing and improving our designs constantly.
Along the way, we have created a wide variety of coin cell battery holders for use in all types of devices, and from handheld medical devices to server motherboards we have solutions for any application. The ever increasing types, sizes, and sheer number of devices which use coin cell battery holders have been keeping us busy, and we have a similarly increasing selection of coin cell battery holder designs.
After all, the perfect coin cell battery holder for a handheld medical device is going to be vastly different from the one for a server motherboard.
http://www.batteryholders.com/coin-cell-holders.php

Memory Protection Devices, Inc.
200 Broadhollow Road
Suite 4
Farmingdale, NY 11735
United States of America
http://memoryprotectiondevices.com/
Phone:  +1 631-249-0001
Fax:  +1 631-249-0002
Email:  info@memoryprotectiondevices.com

==
Digi-Key is a global distributor for Memory Protection Device (MPD) products.
http://www.digikey.com/product-highlights/us/en/memory-protection-devices-coin-cell/2528?WT.z_Tab_Cat=Featured%20Products

http://www.digikey.com/Suppliers/us/Memory-Protection-Devices.page?lang=en

===
For William, ZS5WC (South Africa), Avnet Kopp is the local country distributor for MPD.
Avnet Kopp +27 011 809 6100      
« Last Edit: August 08, 2013, 10:12:03 AM by W9GB » Logged
K5ZRR
Member

Posts: 3




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« Reply #9 on: September 16, 2013, 09:43:31 AM »

I have a TS-690S and a TS-450SAT that I have replaced the batteries in and the only memory that you might lose in these units are any frequency memories you might have program in them.  If I remember correctly the manual that comes with the rigs have a way of turning the rig back on after replacement of the batteries that will prevent the lost or you can just program the frequencies back in.  I would guess all of the Kenwood rigs in this series operate the same way of course I may be wrong.  Just a comment.  73, A.G., K5ZRR
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