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I think these "prefer" a sine wave but will accept either. ________________________________ Sent: Tuesday, May 24, 2022 10:34 AM To: [email protected]

Ok well that was embarrassing. I found out what was wrong with it purely by accident. Looks like CR9 was broken. I was inspecting the area around the high impedance after the 100K carbon comp input

Hi Mike, I'm a bit slow on responding.... Great that the manual was what you needed. Unfortunately I can't help you with the transistors, but hope you are able to source them. Good luck with the

Ok got a decent DMM at my disposal. Scope due to arrive tomorrow. I applied the following test cases: 1. From step 5-6. Short V/ohms and COM terminals, set DCV and 10m range. Unstable reading at

From the time-nuts side of things, the general consensus is that the mismatch between 50 and 75 ohms at the typical 5 or 10 MHz distribution frequency is a complete non-issue. Even more so when you

HP8350B module has DC-FM capability. With an external PLL with correct settings, it can be locked use the AUX YIG signal from the back. However make it work with 8510 require some additional works, a

Yes, current sense resistor is in spec. It’s not the current foldback that is tripping the supply as far as I can tell. It’s an over voltage on the linear supply input to the -40V rail.

Yes, my belief was that UK mains voltage had 220V as the lower side and could go to 240V or more as you say. I don’t think that is the circuit - I’m referring to the A7A1 PCB circuit with three

Hi Tony In the UK the actual mains voltage is NOT 230VAC, it is frequently nearer to, if not over 250 VAC. When the UK harmonised with the EU 230VAC we did not change our mains voltage, just the

Interesting.- thank you Mark. I don't mind DIY, if I had a schematic. I would appreciate a suggestion if we can convert it 50 ohm distribution. That's a resistor network at the end of the signal path

I found a very hiqh quality detailed breakdown video on YouTube.about *GE Interlogix? Kalatel?KTS-250-16* (my unit) https://youtu.be/PjFr5YfxfLE by W2AEW (2015)

Samudra, I did this with a KTS-250 (the smaller version, setup as 1 input x 8 outputs) and I changed everything to 50 Ohms... works great. Not sure you need to though. Have the schematic somewhere in

I've done further checking. The machine is rated for use in the UK at 230V,and the main selector voltage switch is set correctly and the two fuses are rated correctly (2.5A and 0.5A). I checked the

Thanks for the precise instructions - I will do that this coming weekend after another session of home renovations in the new place is complete. I'm bookmarking this.

Thank you Michael, yes, I think they are 75-ohm, so … at short distances (in the same rack) what can I do to match the 50-ohm interfaces with the test equipment. I bought this years ago, and

Oh, forgot about the need to terminate the _unused_ outputs, been a long time. I grew up with thick ethernet, CSMA/CD 10 Mbps, so should have remembered the water pipe flow paradigm. So, if we have GE

Thanks for the input.? I ordered one from China.? I will see what happens.?? As Lothar said, it is worth $40 to take a chance.? I am sure they were all built off the same plans available on

My guess would be that something else in the control loop is faulty. Because it kind sounds like it is working ok in a steady state condition,?but not to transients. Or is conditionally stable. There

Hi Tony I should have said. the mains voltage sensors are VR1 and VR2.? Use ONLY a none grounded instrument such as a hand held DMM to make mesurements around them.? Use of Grounded instruments such

Hi Tony The overvoltage sensors are VR1 and VR2, has one gone faulty? G Edmonds