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If you already have any of the opaque "filled" types of thermal grease, just use that. The clear kind doesn't have any filler, but still helps with the thermal conductivity (way better than air) in

Hi, if I have an RF analyzer that has an analog bandwidth of, say, 10 MHz-4GHz, is it possible to add a front-end that will let it characterise a device at audio rates, i.e. 10 Hz-100 kHz? What does

The closest thing i have found to an online store in the UK with a similar scope as Mcmaster is Raptor Supplies. They supply only US-brand industrial supplies and have a large online catalog (like

Jeff, all you have to do is log out of groups.io and then visit the group yourself. EJP

I already replaced the transformer but its easy to get to so I will get some correct compound and re-install it. The original does not seem to have any filler in it, its clear. Same stuff on the

Richard, I just finished restoring a Tek 647A using a HV transformer from a 453. The transformers are nearly identical except to pin-out arrangement. Both transformers require heat sinking to the

Have you been to MT? I have. And I've assembled many nuclear warheads. Have you? ron N4UE

There are only 2 reasons I can see you would need HV insulating grease between the surfaces. 1: The surfaces need to be electrically insulated. If there is no insulation between the parts, then

My understanding is that there were two reasons. First of all, they had to build the engines in sections, and secondly they had different thermal expansion rates. The so called 'O-rings' were very

<snip> Hello-- One morning years ago, my office mate came to work in a bad mood (unusual for him), and I asked what has happened. "I mistook the tube of diaper-rash ointment for toothpaste," he

Richard, forgive this silly response to your question because I don't know if there is a specific type of heat sink compound used in your application. But... Desitin cream for diaper rash is just

The stuff I am using is MG Chemicals 8462 grease. Has very good insulation properties but not high heat transfer. The original material was thin, clear, grease of some sort both on the transformer

The HV transformer is clamped to a heat sink underneath it (actually above it when the scope is upright). Both sides are coated with thin grease. The same stuff was on the transistor when I took it

Heat dunk compound is zinc powder or sometimes silver. Never silicon grease. Can’t imagine why a transformer would need grease nor , with its mass even need to be “sinked” My 2

Hi Richard. It's amazing how some 'old wives tales' never die. There was recently an excellent link on eHam about heat sink compounds. The author worked as an EE for a large cable Co. So, he dealt

The clear stuff I have is recommended for HV insulation. It does not have a particularly high heat conductivity, probably due to not having any filler. Whatever was on the HV transformer is clear.

Arctic MX-4 is non-conductive. It's the metal filled thermal pastes that are risky to use. IIRC MX-4 is ceramic based. On Thursday, May 3, 2018, 3:17:05 PM CDT, JJ <jajustin@...> wrote: I

I read that silicone is somewhat conductive so you need to be careful with the transistor. I use arctic silver 5 (which is not silicone based) but you should be able to use any silicone based compound

I am still working on my 453. The HV transformer is mounted with some sort of clear grease. I think this is heat sink compound but may just be silicone insulating grease. What is recommended here?

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* SG505 MOD WR WQ AA501A MOD WQ.pdf *Uploaded