Re: A sick 465B
Jeff,
I will take a few guesses to your problem. See if the 10,000 ohm resistors in the -2450v circuit are high/open, C4006 being bad, the .0068mfd condensers bad in some way leaky or open, the two
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Mark Vincent
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#191053
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Re: Tek TDS-3000 V3.41 Firmware
Hi;
There is a thread on EEVBlog about issues with the download.
Here is the link along with what should be a good 3.41
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Ken Eckert
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#191052
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Re: Type 130 L-C Meter
Jerome,
The 10meg resistors I got from Mouser are 1/2W Xicon 273 series. You may want to get extras in this value for other items. The 1% types have a low temperature coefficient which is better in
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Mark Vincent
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#191051
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Re: Type 130 L-C Meter
Thank you Mark, that is information I can use, along with all the other info I have received from the members here. I really do need to replace the electrolytics. They won't last forever. All the
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Jerome D Leach
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#191050
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Re: Type 130 L-C Meter
Jerome,
I have a 130LC I restored. I used 1% resistors except, for now, the 33,000 ohm 5W 5% (I plan to make it a 1% type soon) replacement of R95. It is a bit larger in power than necessary. A 3W
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Mark Vincent
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#191049
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Re: Tek TDS-3000 V3.41 Firmware
There were some floppies that did 2.88 MB, but they were very rare.
CD's do 470 mb or so, DVD's do 4.7 GB.? If at all possible, use an SD card or microSD card for cheapest storage.
Putting a file
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Harvey White
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#191048
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Re: Tek TDS-3000 V3.41 Firmware
Bruce, IIRC, a 3.5 inch floppy holds 1.44 MB.? So, yeah, 1.5 MB plus a bit more would probably push it over the edge.? ? ? ? ? ? ?Jim Ford?Sent from my T-Mobile 4G LTE Device
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Jim Ford
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#191047
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Re: Type 130 L-C Meter
Thank you Bob. I am fortunate in that my 130, unlike about all my other Tek gear, is very clean. Possibly came out of a clean room, who knows. No evidence of tobacco tar or even much dust.
Will also
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Jerome D Leach
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#191046
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Re: A sick 465B
After replacing the CRT with an apparently new part (the anode lead was unbent and had no soot on it, and was strapped to the neck with a latched rubber belt) I now have absolutely no traces on the
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Jeff Dutky
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#191045
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Re: Type 130 L-C Meter
On my 130, the variable oscillator won't oscillate.
On Thursday, February 17, 2022, 05:08:34 PM PST, Tom Lee <tomlee@...> wrote:
Hi Dave,
The docs at VintageTek are great. The
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Bob Albert <bob91343@...>
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#191044
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Re: Type 130 L-C Meter
Dave, Stephen and Albert,
My unit is serial 90XX (forgot already), and as was noted, has a 6DJ8 for V70, although the chassis panel lists the 6BQ7 as well.
Not sure if I am going to the dungeon
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Jerome D Leach
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#191043
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Re: Tek TDS-3000 V3.41 Firmware
To follow up on my previous message, I just noticed that when I copied the V3.41 files from my computer to a memory stick, for carrying to my old laptop in the shop, each file was swelled by 20 to 30
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ebrucehunter
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#191042
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Re: Type 130 L-C Meter
Hi Dave,
The docs at VintageTek are great. The gentleman who wrote the three-part article did a remarkable job of documenting his restoration of his 130. He even restored the manual (he did more than
By
Tom Lee
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#191041
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Re: Type 130 L-C Meter
Jean-Paul,
Given my state of electronics expertise, ALL notes help, and I read them closely. Thank you.
Dave
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Jerome D Leach
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#191040
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Re: Type 130 L-C Meter
Kerry and Tom, thank you both for the link to the Tek Museum's video on the 130, will try to watch it tonight. Have poked around the Museum's website, but haven't availed my self of all the
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Jerome D Leach
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#191039
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Re: Type 130 L-C Meter
Thank you Tom, will take a closer look at the resistors in that circuit, and will then report back.
Dave (yeah, go by Dave, never much cared for Jerome)
By
Jerome D Leach
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#191038
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Tek 2715 75 to 50 ohms conversion
Hi,
I want to change my Tek 2715 75 ohms input to 50 ohms. From what I read in the service manual, its just the input connector that has a 25 ohms resistor, internals of the 2715 is all 50 ohms.
Has
By
arainhoneves
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#191037
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Tek TDS-3000 V3.41 Firmware
In preparing to update the firmware on my TDS3052 scope to V3.41, I downloaded the file from the Tektronix website and began transferring it to four 3-1/2-inch disks as instructed. The first two
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ebrucehunter
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#191036
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Re: Tek 468 GPIB board
Thanks Harvey for your reply. Yes, the 468 does not support remote operation. However it does support a remote WF request from the GPIB controller.
Replacing the CPU with a more modern
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jrseattle
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#191035
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Re: Tek 468 GPIB board
Some things to consider on this scope:
1) it is send only, IIRC, and was never designed for remote operation.
2) you set it up with the front panel controls, I don't think that any of the scope
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Harvey White
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#191034
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