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I do not worry. It is not about using it at a particular frequency. 1KHz. And I don't have time to waste too.

Contact me off list for a copy. /H?kan

I found a bunch of different Cob values (up to 12pF!?) for the 2N2207 with unclear test conditions so I am not convinced 2.5pF Cob is a magic value. Low Ic small junction transistors are not as common

At 1kHz that's just about spot on specification for the taiyo yuden part. The impedance at this frequency will be what, 15, 16 Ohms? Not sure why you'd worry.... At what frequency did you measure

1KHz. This is actual measured values. As for the specifications majority of manufacturers don't give any values on ESR in their datasheets. It is "common knowledge" they are "very low ESR" but reality

I see a lot of replacement possibilities, but over a week or so I place an order at Conrad here in Holland, so I get to figure out what substitues I can take there. From the afternoon till now (4

This is shot in the dark, but I had to try: I found service manual with disks for TDS 500C, 600C and 700C, but disks do not read on any of my ancient 3.5" drives. Does anyone have that software or any

Thanks for the reply. I'm checking the power supply. I'm pretty sure that's were the problem lies. I hoping to replace the caps. and rectifier if I have to. I'm hoping I can use slightly over rated

At what frequency? The ceramic should have well below 10mR at 100kHz according to specification, and I just don't see how it could be otherwise considering the construction. Regarding the generally

Good point Albert, I see what you mean and I just checked it. With a 1KHz signal (1mS) there are about 11.5 cycles when I turn the horizontal position from left to right. So when I "compress" the

In my opinion, the 2SA1145 is your best bet from Mouser. It specifically lists low Cob as a feature, and it's 2.5pF typical at 10V, and fT=200MHz. KSA992 is runner-up with 2pF typical at 30V and

Thanks for the reply. I do have a service manual I downloaded. So I,m seeing about replacing the caps. on the power supply end and checking the rectifier. I'm try to see if I can over rate the new

On Wed, 10 Oct 2012, Dennis Tillman wrote: I've just finished "shotgun approach" rebuild of older TG501 -- almost all 74xx replaced with 74HCT/74LS, lots of resistors removed, some added (it's been

Good catch, George. I only searched for "-300V" to "-70V", forgetting that the staff is sloppy about voltage polarities. Searching for positive breakdown voltages yields many many hits. And good

Those are called Black Beauty capacitors and they usually need replacement.? In fact, nearly all capacitors have limited life, with some exceptions such as ceramic.? Old gear needs the operation

The MANUFACTURER'S DATASHEETS I read specifically call out a small (10 ohm for example) series resistor to mitigate the tantalum's known inability to handle surges. Tek followed these guidelines. The

I see three different Tektronix part numbers for the 2N2207 which makes my suspect they were qualifying or grading them: 151-0063-00 Vcbo 70 Vceo 70 <--- Q184 151-0129-00 Vcbo 50 Vceo 50 151-0187-00

On 10/10/2012 06:37 AM, DiPaolo Richard wrote: I do now need a service manual for a Tektronix 310!!! http://bama.edebris.com/manuals/tek/310a/

Interesting, it certainly is possible if the newer scopes have a sectored 5V flash. These scopes are old enough not to have a read-while-write type of flash so there is either another flash for the

Thank you Bob for the valuable info, and all ,,Thank you!! I do now need a service manual for a Tektronix 310!!! PDF, Internet? ? ?? All The Best, Rich D. ________________________________ To: