Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[lists]

It has been my experience with nicad and NiMH, the higher the cell capacity, 
the shorter the battery life. Not for cycles, but in terms of years.

I designed a charger chip for bridging applications. Bridging batteries are 
used to maintain a system while you swap battery packs. The batteries used in a 
bridging scheme have poor volumetric energy density. (Capacity based on 
volume.) These bridging batteries come equipped with leads, that is they are 
intended to last the life of the device.

My gut feeling is if you want nicad or NiMH batteries that last a long time, go 
for batteries designed for fast charging like those used in remote control 
cars. 

Stating the obvious, but just in case, any pack you roll yourself should use 
batteries with tabs on them. Never solder directly to a battery. If the battery 
doesn't come with tabs attached, you need to get them from a battery house with 
electroweld capability.
 
I've use TNR Technical for battery pack construction. But I wouldn't rule out 
other vendors. This isn't exactly rocket science unless you need to mount a 
thermistor in the pack. 
-Original Message-
From: paul swed 
Sender: time-nuts-boun...@febo.com
Date: Thu, 1 Nov 2012 17:21:11 
To: Discussion of precise time and frequency measurement
Reply-To: Discussion of precise time and frequency measurement
    
Subject: Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

Nimh is indeed the answer to replacing nicads but they are not inexpensive.
The other thing is that the energy densities have gone up over the years so
you can use a smaller footprint. But you have to check the charge rates.
Typically .1c for slow.

I have old nicads from HP that indeed still work pretty well after 30
years. The modern batteries will last 5. Could be lots of reasons. But
thats what I see. Whatever you do, don't buy nicads they are still sold.
Issue is they have been on the shelf for a long time and are a waste of
money.
Regards
Paul

On Thu, Nov 1, 2012 at 5:11 PM, Tom Knox  wrote:

>
> Hi Magnus;
> I have looked several times for an article that explains charging
> perimeters for the various types of batteries on the market.  So many freq
> standards have outdated battery technology. It would be nice to find an
> modern alternative battery that does not require much modification to the
> charge circuit.
> Best Wishes;
> Thomas Knox
>
>
>
> > Date: Thu, 1 Nov 2012 21:51:21 +0100
> > From: mag...@rubidium.dyndns.org
> > To: time-nuts@febo.com
> > Subject: [time-nuts] Sulzer 5A & 5P PSU/battery question
> >
> > Fellow time-nuts,
> >
> > Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed
> > to have 21 D-cell NiCd batteries, but today those are not easy to come
> > by, so I wonder if I can either run the PSU safely without battery or if
> > I can swap in lead-batteries.
> >
> > I know that some of you have these, so I would value your input.
> >
> > I did try to run it a short time without batteries, but the 5 MHz output
> > did not work very well, so I turned it off.
> >
> > Cheers,
> > Magnus
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
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>
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[Scott McGrath]

I'm lucky I have a local batteries plus so no shipping.  They have a lot of 
stores and all of them can build packs

Sent from my iPhone

On Nov 1, 2012, at 8:21 PM, "J. L. Trantham"  wrote:

> I have a local shop that builds battery packs that turn out to be cheaper
> than Batteries Plus since shipping is not involved.  You should check your
> local yellow pages to see if you have a 'Battery Warehouse' type store.
> 
> Joe
> 
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Scott McGrath
> Sent: Thursday, November 01, 2012 4:43 PM
> To: Discussion of precise time and frequency measurement
> Cc: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Sulzer 5A & 5P PSU/battery question
> 
> Batteries Plus in the US builds nicad packs to order they have built packs
> for my 105 and 5065a and 5061a packs with original specification cells
> 
> Sent from my iPhone
> 
> On Nov 1, 2012, at 5:27 PM, Attila Kinali  wrote:
> 
>> On Thu, 01 Nov 2012 21:51:21 +0100
>> Magnus Danielson  wrote:
>> 
>>> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
>>> to have 21 D-cell NiCd batteries, but today those are not easy to come 
>>> by,
>> 
>> NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
>> packs these days. Though, you should be still able to find NiMH batteries,
>> which are in most cases a drop in replacement for NiCd, if you keep
>> two things in mind:
>> 
>> 1) The maximum charge current of the battery should never be exceeded.
>> NiCd were much more forgiving in that regard.
>> 
>> 2) When charging finished, then the batteries need to be disconnected
>> unless you do a trickle charge. At least this was a problem with the
>> early NiMH, it might have changed in the past 15 years. Check datasheet.
>> 
>> 3) Charge end detection for fast NiCd chargers (>1C) does not work with
>> NiMH as the negative Voltage slope of NiMH is not as pronounced as with
>> NiCd. If you have such a charger, you need to replace it with a modern
> one.
>> 
>> 
>> HTH
>> 
>>   Attila Kinali
>> 
>> PS: Yes, i cannot count :-)
>> -- 
>> There is no secret ingredient
>>-- Po, Kung Fu Panda
>> 
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[Adrian]

and here is the corresponding Racal manual:
http://www.ko4bb.com/Manuals/Racal/Racal_MA2595Mc-s_Precision_Frequency_Standard.pdf

Unfortunately, the schematic of the Sulzer manual is incomplete. So, the 
above manual might be useful.
Just the oven control circuits differ a little, but the oscillator stuff 
appears to be exactly the same.


Adrian


paul swed schrieb:

Thanks for the pointer I have a pretty dirty pdf from some place the links
very clean.
Paul
WB8TSL

On Thu, Nov 1, 2012 at 7:24 PM, Magnus Danielson 
wrote:
On 11/01/2012 10:27 PM, Attila Kinali wrote:


On Thu, 01 Nov 2012 21:51:21 +0100
Magnus Danielson>
  wrote:


  Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed

to have 21 D-cell NiCd batteries, but today those are not easy to come
by,


NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
packs these days. Though, you should be still able to find NiMH batteries,
which are in most cases a drop in replacement for NiCd, if you keep
two things in mind:

1) The maximum charge current of the battery should never be exceeded.
NiCd were much more forgiving in that regard.

2) When charging finished, then the batteries need to be disconnected
unless you do a trickle charge. At least this was a problem with the
early NiMH, it might have changed in the past 15 years. Check datasheet.

3) Charge end detection for fast NiCd chargers (>1C) does not work with
NiMH as the negative Voltage slope of NiMH is not as pronounced as with
NiCd. If you have such a charger, you need to replace it with a modern
one.


Thanks for the input guys!

The manual for them both is at
http://www.ko4bb.com/Manuals/**09)_Misc_Test_Equipment/**
Sulzer_Laboratories_Model_5A_**Frequency_Standard.pdf

The 5P manual describes the charging operation, it has a 50 mA charge
current, a fast charging feature.

By the look of things, the way that the design is done, it should survive
without the battery-pack installed.


Cheers,
Magnus

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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[paul swed]

Thanks for the pointer I have a pretty dirty pdf from some place the links
very clean.
Paul
WB8TSL

On Thu, Nov 1, 2012 at 7:24 PM, Magnus Danielson  wrote:

> On 11/01/2012 10:27 PM, Attila Kinali wrote:
>
>> On Thu, 01 Nov 2012 21:51:21 +0100
>> Magnus Danielson>
>>  wrote:
>>
>>
>>  Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed
>>> to have 21 D-cell NiCd batteries, but today those are not easy to come
>>> by,
>>>
>>
>> NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
>> packs these days. Though, you should be still able to find NiMH batteries,
>> which are in most cases a drop in replacement for NiCd, if you keep
>> two things in mind:
>>
>> 1) The maximum charge current of the battery should never be exceeded.
>> NiCd were much more forgiving in that regard.
>>
>> 2) When charging finished, then the batteries need to be disconnected
>> unless you do a trickle charge. At least this was a problem with the
>> early NiMH, it might have changed in the past 15 years. Check datasheet.
>>
>> 3) Charge end detection for fast NiCd chargers (>1C) does not work with
>> NiMH as the negative Voltage slope of NiMH is not as pronounced as with
>> NiCd. If you have such a charger, you need to replace it with a modern
>> one.
>>
>
> Thanks for the input guys!
>
> The manual for them both is at
> http://www.ko4bb.com/Manuals/**09)_Misc_Test_Equipment/**
> Sulzer_Laboratories_Model_5A_**Frequency_Standard.pdf
>
> The 5P manual describes the charging operation, it has a 50 mA charge
> current, a fast charging feature.
>
> By the look of things, the way that the design is done, it should survive
> without the battery-pack installed.
>
>
> Cheers,
> Magnus
>
> __**_
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/**
> mailman/listinfo/time-nuts
> and follow the instructions there.
>
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[J. L. Trantham]

I have a local shop that builds battery packs that turn out to be cheaper
than Batteries Plus since shipping is not involved.  You should check your
local yellow pages to see if you have a 'Battery Warehouse' type store.

Joe

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Scott McGrath
Sent: Thursday, November 01, 2012 4:43 PM
To: Discussion of precise time and frequency measurement
Cc: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

Batteries Plus in the US builds nicad packs to order they have built packs
for my 105 and 5065a and 5061a packs with original specification cells

Sent from my iPhone

On Nov 1, 2012, at 5:27 PM, Attila Kinali  wrote:

> On Thu, 01 Nov 2012 21:51:21 +0100
> Magnus Danielson  wrote:
> 
>> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
>> to have 21 D-cell NiCd batteries, but today those are not easy to come 
>> by,
> 
> NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
> packs these days. Though, you should be still able to find NiMH batteries,
> which are in most cases a drop in replacement for NiCd, if you keep
> two things in mind:
> 
> 1) The maximum charge current of the battery should never be exceeded.
> NiCd were much more forgiving in that regard.
> 
> 2) When charging finished, then the batteries need to be disconnected
> unless you do a trickle charge. At least this was a problem with the
> early NiMH, it might have changed in the past 15 years. Check datasheet.
> 
> 3) Charge end detection for fast NiCd chargers (>1C) does not work with
> NiMH as the negative Voltage slope of NiMH is not as pronounced as with
> NiCd. If you have such a charger, you need to replace it with a modern
one.
> 
> 
> HTH
> 
>Attila Kinali
> 
> PS: Yes, i cannot count :-)
> -- 
> There is no secret ingredient
> -- Po, Kung Fu Panda
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[Magnus Danielson]

On 11/01/2012 10:27 PM, Attila Kinali wrote:

On Thu, 01 Nov 2012 21:51:21 +0100
Magnus Danielson  wrote:


Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed
to have 21 D-cell NiCd batteries, but today those are not easy to come
by,


NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
packs these days. Though, you should be still able to find NiMH batteries,
which are in most cases a drop in replacement for NiCd, if you keep
two things in mind:

1) The maximum charge current of the battery should never be exceeded.
NiCd were much more forgiving in that regard.

2) When charging finished, then the batteries need to be disconnected
unless you do a trickle charge. At least this was a problem with the
early NiMH, it might have changed in the past 15 years. Check datasheet.

3) Charge end detection for fast NiCd chargers (>1C) does not work with
NiMH as the negative Voltage slope of NiMH is not as pronounced as with
NiCd. If you have such a charger, you need to replace it with a modern one.


Thanks for the input guys!

The manual for them both is at
http://www.ko4bb.com/Manuals/09)_Misc_Test_Equipment/Sulzer_Laboratories_Model_5A_Frequency_Standard.pdf

The 5P manual describes the charging operation, it has a 50 mA charge 
current, a fast charging feature.


By the look of things, the way that the design is done, it should 
survive without the battery-pack installed.


Cheers,
Magnus

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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[Tom Knox]

Hi Magnus;
I know I am stating the obvious but the batteries with no external power 
provides by far the lowest noise. And if that is desired NiMh have a much 
better discharge characteristic then NiCd. But there is something to be said 
for maintaining the oscillator in factory original condition. I would test it 
and if it has really outstanding performance I would upgrade the batteries and 
supply. If not spectacular I would restore to factory original. They are an art 
object.
Best Wishes;
Thomas Knox



> Date: Thu, 1 Nov 2012 21:51:21 +0100
> From: mag...@rubidium.dyndns.org
> To: time-nuts@febo.com
> Subject: [time-nuts] Sulzer 5A & 5P PSU/battery question
> 
> Fellow time-nuts,
> 
> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
> to have 21 D-cell NiCd batteries, but today those are not easy to come 
> by, so I wonder if I can either run the PSU safely without battery or if 
> I can swap in lead-batteries.
> 
> I know that some of you have these, so I would value your input.
> 
> I did try to run it a short time without batteries, but the 5 MHz output 
> did not work very well, so I turned it off.
> 
> Cheers,
> Magnus
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
  
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[John Ackermann N8UR]

Hi Magnus -- I was recently (within the last year) able to get the battery pack 
in my 5P power supply rebuilt by the local Batteries Plus store.  It took a few 
weeks for them to order and obtain the cells, but they do seem to be available.

John

On Nov 1, 2012, at 4:51 PM, Magnus Danielson  wrote:

> Fellow time-nuts,
> 
> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed to 
> have 21 D-cell NiCd batteries, but today those are not easy to come by, so I 
> wonder if I can either run the PSU safely without battery or if I can swap in 
> lead-batteries.
> 
> I know that some of you have these, so I would value your input.
> 
> I did try to run it a short time without batteries, but the 5 MHz output did 
> not work very well, so I turned it off.
> 
> Cheers,
> Magnus
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[Adrian]

Hi Magnus,

that should be pretty much identical to my recently acquired Racal MA259 
that consists of a SA500 5 MHz oscillator and PU525 power supply / 
battery pack.


The batteries have already been replaced by a 'battery simulator'. I 
haven't looked inside yet, but it consists very likely just of a number 
of series connected Z-diodes.
The diodes should be dimensioned to handle the high charge current of 
200mA. The charging current is already limited by a series resistor, so 
nothing else should be required.
A larger electrolytic cap in parallel to the Z-diode stack appares to 
make sense.


I replaced all of the notoriously unreliable carbon composite resistors 
in the oscillator and inner oven circuit.
Tonight I wound a new toroidal transformer for the inner oven 
temperature control bridge.
The old one had developed a short between the primary and secondary 
windings that I could make disappear for a while though not permanently.
Unfortunately, tonight it became conductive again and my 2nd attempt to 
burn it away ended with a completely burned away winding.
However, at the first repair attempt, I had measured the inductance 
values of the original transformer.
Thanks to Sulzer's brilliant idea to include an independent inner oven 
temperature indicator, I was able to verify that nothing has changed.
Now I'm waiting for the frequency to stabilize again, which I'm 
expecting to happen within the next 2...4 weeks.


Adrian


Magnus Danielson schrieb:

Fellow time-nuts,

Yesterday I picked up a Sulzer 5A + 5P without batteries. It is 
supposed to have 21 D-cell NiCd batteries, but today those are not 
easy to come by, so I wonder if I can either run the PSU safely 
without battery or if I can swap in lead-batteries.


I know that some of you have these, so I would value your input.

I did try to run it a short time without batteries, but the 5 MHz 
output did not work very well, so I turned it off.


Cheers,
Magnus

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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[David]

I have used NiMH D cells as directly replacements for NiCd D cells in
devices that have slow, 0.1C rate or 14 hour, chargers without
problems.  It takes longer to fully charge since the NiMH cells have
about twice the capacity but then they last about twice as long.

The price for the MiMH cells is not cheap though.  A less expensive
option would be using a pair of 12 volt lead-acid gel cells if you
modify the charging circuitry to float charge them to 27.6 volts.

On Thu, 01 Nov 2012 21:51:21 +0100, Magnus Danielson
 wrote:

>Fellow time-nuts,
>
>Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
>to have 21 D-cell NiCd batteries, but today those are not easy to come 
>by, so I wonder if I can either run the PSU safely without battery or if 
>I can swap in lead-batteries.
>
>I know that some of you have these, so I would value your input.
>
>I did try to run it a short time without batteries, but the 5 MHz output 
>did not work very well, so I turned it off.
>
>Cheers,
>Magnus
>
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[Scott McGrath]

Batteries Plus in the US builds nicad packs to order they have built packs for 
my 105 and 5065a and 5061a packs with original specification cells

Sent from my iPhone

On Nov 1, 2012, at 5:27 PM, Attila Kinali  wrote:

> On Thu, 01 Nov 2012 21:51:21 +0100
> Magnus Danielson  wrote:
> 
>> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
>> to have 21 D-cell NiCd batteries, but today those are not easy to come 
>> by,
> 
> NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
> packs these days. Though, you should be still able to find NiMH batteries,
> which are in most cases a drop in replacement for NiCd, if you keep
> two things in mind:
> 
> 1) The maximum charge current of the battery should never be exceeded.
> NiCd were much more forgiving in that regard.
> 
> 2) When charging finished, then the batteries need to be disconnected
> unless you do a trickle charge. At least this was a problem with the
> early NiMH, it might have changed in the past 15 years. Check datasheet.
> 
> 3) Charge end detection for fast NiCd chargers (>1C) does not work with
> NiMH as the negative Voltage slope of NiMH is not as pronounced as with
> NiCd. If you have such a charger, you need to replace it with a modern one.
> 
> 
> HTH
> 
>Attila Kinali
> 
> PS: Yes, i cannot count :-)
> -- 
> There is no secret ingredient
> -- Po, Kung Fu Panda
> 
> ___
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[Attila Kinali]

On Thu, 01 Nov 2012 21:51:21 +0100
Magnus Danielson  wrote:

> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
> to have 21 D-cell NiCd batteries, but today those are not easy to come 
> by,

NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
packs these days. Though, you should be still able to find NiMH batteries,
which are in most cases a drop in replacement for NiCd, if you keep
two things in mind:

1) The maximum charge current of the battery should never be exceeded.
NiCd were much more forgiving in that regard.

2) When charging finished, then the batteries need to be disconnected
unless you do a trickle charge. At least this was a problem with the
early NiMH, it might have changed in the past 15 years. Check datasheet.

3) Charge end detection for fast NiCd chargers (>1C) does not work with
NiMH as the negative Voltage slope of NiMH is not as pronounced as with
NiCd. If you have such a charger, you need to replace it with a modern one.


HTH

Attila Kinali

PS: Yes, i cannot count :-)
-- 
There is no secret ingredient
 -- Po, Kung Fu Panda

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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[paul swed]

Nimh is indeed the answer to replacing nicads but they are not inexpensive.
The other thing is that the energy densities have gone up over the years so
you can use a smaller footprint. But you have to check the charge rates.
Typically .1c for slow.

I have old nicads from HP that indeed still work pretty well after 30
years. The modern batteries will last 5. Could be lots of reasons. But
thats what I see. Whatever you do, don't buy nicads they are still sold.
Issue is they have been on the shelf for a long time and are a waste of
money.
Regards
Paul

On Thu, Nov 1, 2012 at 5:11 PM, Tom Knox  wrote:

>
> Hi Magnus;
> I have looked several times for an article that explains charging
> perimeters for the various types of batteries on the market.  So many freq
> standards have outdated battery technology. It would be nice to find an
> modern alternative battery that does not require much modification to the
> charge circuit.
> Best Wishes;
> Thomas Knox
>
>
>
> > Date: Thu, 1 Nov 2012 21:51:21 +0100
> > From: mag...@rubidium.dyndns.org
> > To: time-nuts@febo.com
> > Subject: [time-nuts] Sulzer 5A & 5P PSU/battery question
> >
> > Fellow time-nuts,
> >
> > Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed
> > to have 21 D-cell NiCd batteries, but today those are not easy to come
> > by, so I wonder if I can either run the PSU safely without battery or if
> > I can swap in lead-batteries.
> >
> > I know that some of you have these, so I would value your input.
> >
> > I did try to run it a short time without batteries, but the 5 MHz output
> > did not work very well, so I turned it off.
> >
> > Cheers,
> > Magnus
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
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> > and follow the instructions there.
>
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[paul swed]

Magnus
A rare occasion that I get to have an answer for you.
I have two sulzers also and the batteries 5 years ago were an issue.
I believe nimh batteries could be put in if you really need batteries. At
$35 I passed that option. Plus batteries are just a pain.
I think the issue you have is that without the batteries its filtering is
quite poor you need a larger filter cap 2200 uf at the very least. Its 21 V
as I recall. The system is indeed intended to charge nicads and so it
really is a current charger. But will run the oscillator with a cap.

Far wiser (Which I did not do) is to replace the guts with a regulator. A 3
terminal adjustable would be great plus a bit of heat sink. Though you
could use the actual assembly for that with a insulator.
By the way the can cap thats is in my units were bad.
Good luck great oscillators
Regards
Paul
WB8TSL


On Thu, Nov 1, 2012 at 4:51 PM, Magnus Danielson  wrote:

> Fellow time-nuts,
>
> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed
> to have 21 D-cell NiCd batteries, but today those are not easy to come by,
> so I wonder if I can either run the PSU safely without battery or if I can
> swap in lead-batteries.
>
> I know that some of you have these, so I would value your input.
>
> I did try to run it a short time without batteries, but the 5 MHz output
> did not work very well, so I turned it off.
>
> Cheers,
> Magnus
>
> __**_
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/**
> mailman/listinfo/time-nuts
> and follow the instructions there.
>
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Re: [time-nuts] Sulzer 5A & 5P PSU/battery question

[Tom Knox]

Hi Magnus;
I have looked several times for an article that explains charging perimeters 
for the various types of batteries on the market.  So many freq standards have 
outdated battery technology. It would be nice to find an modern alternative 
battery that does not require much modification to the charge circuit.
Best Wishes;
Thomas Knox



> Date: Thu, 1 Nov 2012 21:51:21 +0100
> From: mag...@rubidium.dyndns.org
> To: time-nuts@febo.com
> Subject: [time-nuts] Sulzer 5A & 5P PSU/battery question
> 
> Fellow time-nuts,
> 
> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
> to have 21 D-cell NiCd batteries, but today those are not easy to come 
> by, so I wonder if I can either run the PSU safely without battery or if 
> I can swap in lead-batteries.
> 
> I know that some of you have these, so I would value your input.
> 
> I did try to run it a short time without batteries, but the 5 MHz output 
> did not work very well, so I turned it off.
> 
> Cheers,
> Magnus
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
  
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[time-nuts] Sulzer 5A & 5P PSU/battery question

[Magnus Danielson]

Fellow time-nuts,

Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
to have 21 D-cell NiCd batteries, but today those are not easy to come 
by, so I wonder if I can either run the PSU safely without battery or if 
I can swap in lead-batteries.


I know that some of you have these, so I would value your input.

I did try to run it a short time without batteries, but the 5 MHz output 
did not work very well, so I turned it off.


Cheers,
Magnus

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