
Re: Your generosity is STUNNING!
I concur. Consider it an appreciation award from the members of Tekscopes :)
Paul

Paul Amaranth, GCIH  Manchester MI, USA
Aurora Group of Michigan, LLC 
I concur. Consider it an appreciation award from the members of Tekscopes :)
Paul

Paul Amaranth, GCIH  Manchester MI, USA
Aurora Group of Michigan, LLC 

By
Paul Amaranth
·
#163566
·


Re: Your generosity is STUNNING!
A nice dinner for two $250
A couple of bottles of wine $100
Taking care of TekScopes, Priceless!
Dennis and Michael should: Put some of the money in your wallets.
A nice dinner for two $250
A couple of bottles of wine $100
Taking care of TekScopes, Priceless!
Dennis and Michael should: Put some of the money in your wallets.

By
Errick
·
#163565
·


Re: Your generosity is STUNNING!
Dennis, I did not see mine in the list.
January 1st for $20.00
3SH79206CC5260117 via PayPal
I don't need it back. Please put it in a savings account aside for the future of the group. Or donate to
Dennis, I did not see mine in the list.
January 1st for $20.00
3SH79206CC5260117 via PayPal
I don't need it back. Please put it in a savings account aside for the future of the group. Or donate to

By
Richard in Edenton NC
·
#163564
·


Re: 465 (Late S/N) Timing Board (A7) 670346700?
Check here:
https://www.eevblog.com/forum/buysellwanted/fsnewtestequipmentrepairpartshpagilenttektronixflukeetc/
Check here:
https://www.eevblog.com/forum/buysellwanted/fsnewtestequipmentrepairpartshpagilenttektronixflukeetc/

By
DaveH52
·
#163563
·


Re: Your generosity is STUNNING!
Maybe ask for just one dollar next time.
Enjoy your new DMM!
Maybe ask for just one dollar next time.
Enjoy your new DMM!

By
DaveH52
·
#163562
·


Re: Risetime calculator (in tekwiki)
This originates I think from the idea that around a maximum or minimum a function is quadratic plus higher order terms.
If you short together both ends of a linear pot then the resistance to the wiper
This originates I think from the idea that around a maximum or minimum a function is quadratic plus higher order terms.
If you short together both ends of a linear pot then the resistance to the wiper

By
Albert Otten
·
#163561
·


Re: Your generosity is STUNNING!
Hi Dennis,
As a list owner, I can attest to the amount of work that it can be.
PLEASE keep my donation for the future, and even (as someone else said) take your wife and Michael and his wife out to
Hi Dennis,
As a list owner, I can attest to the amount of work that it can be.
PLEASE keep my donation for the future, and even (as someone else said) take your wife and Michael and his wife out to

By
Phillip Potter
·
#163560
·


Re: Risetime calculator (in tekwiki)
It's not intuitive but if you do the math it is, indeed works out perfectly linear  assuming the trim pots are set to the value of 50R.
Whoever designed it, deserves to be an employee of the
It's not intuitive but if you do the math it is, indeed works out perfectly linear  assuming the trim pots are set to the value of 50R.
Whoever designed it, deserves to be an employee of the

By
Leo Bodnar
·
#163559
·


Re: Risetime calculator (in tekwiki)
Roy, your last two comments make no sense.
Albert has already determined that the taper of the pots is
*linear* and the scales of the two pots are *linear*, and
proved it out mathematically.
Read
Roy, your last two comments make no sense.
Albert has already determined that the taper of the pots is
*linear* and the scales of the two pots are *linear*, and
proved it out mathematically.
Read

By
Chuck Harris <cfharris@...>
·
#163558
·


Re: Your generosity is STUNNING!
Hi,
I'm sure that I'm something wrong, but I don't see the list of contributors. A cue is appreciated.
Ignacio, EB4APL
Hi,
I'm sure that I'm something wrong, but I don't see the list of contributors. A cue is appreciated.
Ignacio, EB4APL

By
EB4APL
·
#163557
·


Re: Risetime calculator (in tekwiki)
Hi GerryR, see for instance https://groups.io/g/TekScopes/message/163507 .
Albert
Hi GerryR, see for instance https://groups.io/g/TekScopes/message/163507 .
Albert

By
Albert Otten
·
#163555
·


Re: Risetime calculator (in tekwiki)
I'm not sure I understand what you mean Roy. The x in my story is linear in the rotation angle, linear but rescaled to run from 0 (fully ccw) to 1 (fully cw). Of course you can avoid the angle in the
I'm not sure I understand what you mean Roy. The x in my story is linear in the rotation angle, linear but rescaled to run from 0 (fully ccw) to 1 (fully cw). Of course you can avoid the angle in the

By
Albert Otten
·
#163554
·


Re: Risetime calculator (in tekwiki)
Albert,
That's great, but where do you use such an instrument. I'm trying to figure out where three risetimes, or two as the case may be, react to give me a single total risetime. It's a neat
Albert,
That's great, but where do you use such an instrument. I'm trying to figure out where three risetimes, or two as the case may be, react to give me a single total risetime. It's a neat

By
GerryR <totalautomation1@...>
·
#163553
·


Re: Risetime calculator (in tekwiki)
Thanks Albert, I did one spot calculation with ABC at midtravel and the result was exact so I was just settling down to do the full calculation.
Roger
Thanks Albert, I did one spot calculation with ABC at midtravel and the result was exact so I was just settling down to do the full calculation.
Roger

By
Roger Evans
·
#163551
·


Re: 7A26 transient response 5 nS all atten
Hello Jon,
Difficult to read in the picture, but for probe calibration remember that the input capacitance changed at some S/N from 20 pF to 22 pF.
I also have several 7A26s as general purpose
Hello Jon,
Difficult to read in the picture, but for probe calibration remember that the input capacitance changed at some S/N from 20 pF to 22 pF.
I also have several 7A26s as general purpose

By
Albert Otten
·
#163549
·


Re: Your generosity is STUNNING!
Hi Dennis,
I haven't been able to make my contribution without paying a transfer fee going to Paypal. I tried but couldn't because of my funds coming from outside the USA (where you as the beneficiary
Hi Dennis,
I haven't been able to make my contribution without paying a transfer fee going to Paypal. I tried but couldn't because of my funds coming from outside the USA (where you as the beneficiary

By
Raymond Domp Frank
·
#163548
·


Re: 555 replacement pair fan motor
Hi David. I noticed a fan motor listed on eBay. I have had much success repairing these motors. I take them apart so I can clean and re lubricate the bushings. This usually works although not always.
Hi David. I noticed a fan motor listed on eBay. I have had much success repairing these motors. I take them apart so I can clean and re lubricate the bushings. This usually works although not always.

By
John Williams
·
#163547
·


Re: Risetime calculator (in tekwiki)
great :)
thank you Albert
great :)
thank you Albert

By
amirb
·
#163546
·


Re: Risetime calculator (in tekwiki)
Actually the math appears to be surprisingly simple and in theory the instrument shows EXACT results with LINEAR pots..
Suppose all fixed (plus their trimpots) and variables have equal resistance R (5
Actually the math appears to be surprisingly simple and in theory the instrument shows EXACT results with LINEAR pots..
Suppose all fixed (plus their trimpots) and variables have equal resistance R (5

By
Albert Otten
·
#163545
·


Re: 7A26 transient response 5 nS all atten
Hello all:
After the 7A26 transient fix, I realized how useful these 7A26 are, so I searched my storage....2 more + 3 junkers!
2 tested 9 years ago, marked with faults, but after exercising
Hello all:
After the 7A26 transient fix, I realized how useful these 7A26 are, so I searched my storage....2 more + 3 junkers!
2 tested 9 years ago, marked with faults, but after exercising

By
JeanPaul
·
#163544
·
