Hi Jim,
I concur about the Nickle. It isn't worth its weight in nickel.
NiCd rechargeable cells have many advantages over Li rechargeable cells as 2016 Samsung Galaxy Note 7 owners, Boeing Dreamliner owners, and even a few Tesla owners, are acutely aware of by now.
But the main advantage NiCd rechargeable cells had in 1984 when Tek was making its handheld 214 scope was that Li rechargeable cells didn't exist. According to Wikipedia () the first commercial lithium-ion battery was released in 1991 by Sony and Asahi Kasei.
I am old enough to remember when portable radios had a carrying handle, five to seven tubes, and took two batteries to operate. There was the A battery and the much larger B battery. What remains from those days is the notation sometimes used for the high side of a power supply as the "B+".
Until someone comes up with a replacement for the Li rechargeable battery that has higher storage density I guess we will have to live with cell phones that are so big you have to carry them around in a pocket. When the replacement for the Li battery finally comes along maybe cell phones will finally shrink so they are no larger than a Nickle.
Dennis Tillman W7PF
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-----Original Message-----
From: Jim Ford
Sent: Friday, August 17, 2018 12:41 PM
Subject: Re: [TekScopes] tektronix 214 option 94
Uh, Dennis, that's Nickel, not Nickle. A nickle is a kind of bird, and
I have heard of people winning bets by asking the color of a
nickle. When people say, "silver", they lose the bet because the nickle
bird is green!
And I don't count nickel-cadmium batteries as my favorite rechargeable,
not by a long shot. The memory effects are terrible, cadmium is a
serious hazard, and they weigh much more than the lithium types.
Have to disagree with you there.
Jim
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Dennis Tillman W7PF
<dennis@...> Date: 8/17/18 12:12 PM (GMT-08:00) To:
[email protected] Subject: Re: [TekScopes] tektronix 214 option 94 Hi
Miguel, I would guess that around 1984 Mercury was banned in the US
around that time. But I am pretty sure Tek used rechargeable Nickle
Cadmium batteries in their scopes. Nickle Cadmium has always been the
rechargeable battery of choice by everyone.
If you notice this modification applied to instruments starting with
serial number B010100. That is the serial number of the first instrument
to come off the production line so I believe you are correct. This was a
flaw in the original rectifier circuit design that they were correcting.
I do not believe it has anything to do with Option 94. Option 94 should
have been listed in the service manual since options are always listed
in the catalog and available to the customer at the time of purchase. If
you look at the back pages of the service manual for the 214 you will
see the options listed. But there is only Option1 and 2. There is no
option 94 so the mystery remains unsolved.
I have another idea that may shed some light on this. I will ask Hakan
Hinze what he can find out.
Dennis Tillman W7PF
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Miguel Work
Sent: Friday, August 17, 2018 9:10 AM
To: [email protected]
Subject: Re: [TekScopes] tektronix 214 option 94
Hi Dennis, thanks for your answer, could be a modified rectifier
board?
Regards
Miguel
-----Mensaje original-----
De: [email protected] [mailto:[email protected]] En nombre de
Dennis Tillman W7PF Enviado el: jueves, 16 de agosto de 2018 18:24
Para: [email protected]
Asunto: Re: [TekScopes] tektronix 214 option 94
Hi Miguel,
That is definitely an odd number for an option. Up until now I would
have said options are ALWAYS listed in the catalogs as opposed to
modifications which are never listed. But I just checked the 1983
catalog and the only options are 01 and 02 and they relate to
different mains power for use in foreign countries. Does your 214 have
an unusual power plug?
I just checked my 214 and it has no options. My option "insert" is
blank.
Dennis Tillman W7PF
-----Original Message-----
From: Miguel Work
Sent: Thursday, August 16, 2018 2:25 AM
Subject: [TekScopes] tektronix 214 option 94
Which is optino 94 for a Tektronix 214?
--
Dennis Tillman W7PF
TekScopes Moderator
