Baluncore's latest activity

It is good that you are now recognising that the receiver front-end needs to be at the focus. I agree that if you pull back your...

If the fluid is pure water, then the capillaries that wick the liquid water back to the hot end, will need to survive ice wedging when...

It does not have to use cryogenic cooling, a stack of Peltier refrigeration modules will do the job at the focus of an amateur RA...

I warn the neophytes of how steep the learning curve really is. It may seem easy to engineer an amateur RA observatory, for some...

I maintained and operated a radio astronomy observatory before I retired.

By virtue of the cosmic noise it receives, every receiver that is connected to an antenna, is doing some radio astronomy. The band...

There were one or more tricks involved in the 100 mpg demonstration with that big V8. Maybe the wind direction changed midday, so there...

My guess is that the engine employed a gas mixer, like on an LPG fuelled vehicle, but produced the gas by boiling high octane gasoline...

You are free to select your transform size. For one project, I was monitoring the background noise floor across the HF band from 1 MHz...

I think the mud is probably marine, originally volcanic ash, washed into the sea. That mud will probably be more conductive than the...

If you get serious about doing home RA, you will build your own two channel receiver, from FET based LNAs, with matched band-pass...

Welcome to PF. https://en.wikipedia.org/wiki/Sidoarjo_mud_flow There may be someone here who knows the answer, but this question is...

Ferranti was only hired to design the first. Sebastian Ziani de Ferranti was hired by the London Electric Supply Corporation, to design...

48V, 400Hz was mainly used in aircraft for instrumentation, gyros, synchros, resolvers, and magnetic amplifiers, all of which were, in...

There is a reason why they originally settled on 73 volts. Maybe insulation was expensive, while silver was free.