Glued the rear baffle onto the second of my MTM's today. Had an OH <insert your choice of expletive here> moment just after I placed the baffle onto the speaker. I'd put it on inside out! Now I realise that might sound a bit weird, but because my binding posts are not quite long enough for 25MM MDF I had to route out a few mm to allow me to put the first of two screws on. Anyway luckily I realised pretty quickly and was able to pull it off wipe off the glue, put some more glue down and get it screwed down and clamped without any problems. Would have been a bit of a disaster If I hadn't noticed straight away.

Was planning on putting in the new RCA's to the amp today as well, as a way of bypassing the preamp, but just didn't have the time or the energy. Maybe next weekend

Tony.

https://www.flickr.com/photos/12528591@N06/

https://en.wikipedia.org/wiki/Aluminium_battery

Aluminium batteries or aluminum batteries are commonly known as aluminium-air batteries or Al-air batteries, since they produce electricity from the reaction of oxygen in the air with aluminium. They have one of the highest energy densities of all batteries, but they are not widely used because of previous problems with cost, shelf-life, start-up time and byproduct removal, which have restricted their use to mainly military applications. An electric vehicle with aluminium batteries could have potentially ten to fifteen times the range of lead-acid batteries with a far smaller total weight[1].



https://exo.net/~pauld/activities/AlA...irbattery.html

https://en.wikipedia.org/wiki/Activated_carbon

The word activated in the name is sometimes substituted by active.

Due to its high degree of microporosity, just one gram of activated carbon has a surface...

Last night I built an earth loop breaker for my trusty old Series 200 100W mosfet amp. It's been annoying me with Hum ever since I moved to the new place. Combination of having the mythtv HTPC and also cable like TV antena that is shared through multiple units. Well it cut it down but it didn't cure it.. The gainclone is dead quiet... the differece? I used an 12 Ohm resistor on the gainclone, and it is running without a pre, the series 200 one I used a 10 ohm as per Rod Elliot's article (and the connection is through the preamp built into the amp. Tomorrow I plan set up a switch and some new "direct" RCA jacks so I can run the HTPC direct bypassing the integrated pre.... hopefully that'll do the trick. If not I'll probably try bumping the resistor up to 12 ohms...

Today I was going to glue the back baffle on my second MTM but it got very gusty and I thought it would rain (my work space is on the balcony, so not good for gluing if looking like rain). So I only...

I've never had a blog before. I've always regarded them as a bit like a non-private (in the extreme) diary that any one with an internet connection can read. What possible attraction could that have!!! (I guess if your a complete extrovert/exhibitionist then there could be some attraction).

I've never really been keen on diarys, I used to keep one for work to keep track of what I was doing, but at some point just got plain lazy and haven't used one for probably more than 10 years. I've never kept a personal one, though now that I'm getting older I do sometimes regret that. When I was 25 I could remember just about everything I'd done in my life (from about the age of 12)... Now that I'm over 40 It's a bit more of a challenge

Anyway I guess I'm going to treat this blog as a kind of diary of what I've been doing with my DIY Stuff. I always think that blogs are supposed to be witty and interesting and lots of people are supposed to like to subscribe to them...

Here is an example of engineering I admire.

https://www.diyaudio.com/forums/showthread.php?t=148694

I am going to use my blog to document threads that I am interested in.

This caught my interest.

https://www.diyaudio.com/forums/showthread.php?t=80194

Looking at a B1 buffered Lightspeed.

~

Just finished my mic amplifier. Have not done any testing yet, but so far it seems to sound good. I'll post more details later.

I'll use this as the formal place for my public expression