Thought it was time to say hello, I got onto this site at the recommendation of my good friend Paulb and am now a total addict. I am a geomatics engineer by training so I have had a bit of electronics instruction but that was long, long ago. I have always been a fairly handy type with tools though, and this hobby provides so many opportunities to use them!
Right now I am finishing up a p3a power amp (pics to follow someday...) but my 'next project' list is filling up fast. I have accumulated the parts for a couple of LM3886 gainclones but I think maybe I will turn my attention to some speakers first. On second thought, maybe a preamp.
One thing I really want to do is build a powered stage monitor for my daughter in law who plays the piano for a band. I would really appreciate hearing from anybody who has any experience with building this type of equipment.
Dave
/I guess now I will need a spiffy icon and signature
Right now I am finishing up a p3a power amp (pics to follow someday...) but my 'next project' list is filling up fast. I have accumulated the parts for a couple of LM3886 gainclones but I think maybe I will turn my attention to some speakers first. On second thought, maybe a preamp.
One thing I really want to do is build a powered stage monitor for my daughter in law who plays the piano for a band. I would really appreciate hearing from anybody who has any experience with building this type of equipment.
Dave
/I guess now I will need a spiffy icon and signature
Welcome Dave,
and could you please enlighten me about what a "geomatic
engineer" is? I have never heard that term before. Sounds
like some kind of cross between geologist,mathematician and
engineer, but I dare not draw any conclusions from that.
and could you please enlighten me about what a "geomatic
engineer" is? I have never heard that term before. Sounds
like some kind of cross between geologist,mathematician and
engineer, but I dare not draw any conclusions from that.
Thanks guys
What a great forum! Thanks for the warm welcomes from everyone.
Christer - geomatics is the science of spatial relationships so you are pretty close. I deal mostly with geodesy (shape of the earth) and cartography (map making) in my work but it also includes stuff like navigation and positioning.
Dave/Planet10 - thanks for the welcome. I really enjoy your site, as it turns out I still listen to two of the 'classics' you list - Radford S90's and Dynaco A25's. They still sound pretty good to me.
Dave🙂
What a great forum! Thanks for the warm welcomes from everyone.
Christer - geomatics is the science of spatial relationships so you are pretty close. I deal mostly with geodesy (shape of the earth) and cartography (map making) in my work but it also includes stuff like navigation and positioning.
Dave/Planet10 - thanks for the welcome. I really enjoy your site, as it turns out I still listen to two of the 'classics' you list - Radford S90's and Dynaco A25's. They still sound pretty good to me.
Dave🙂
Re: Thanks guys
You've got the maps; other people will develop the hardware.
Oops, we need another forum then.
Welcome aboard Dave
/Hugo
What about a DIY GPS system?mercator said:
You've got the maps; other people will develop the hardware.
Oops, we need another forum then.
Welcome aboard Dave
/Hugo
Re: Thanks guys
🙂
My buddy Bill Perkins built an aweful lot of the S90s for the guy that had the little shop in the Westbrooke (?) Mall. Any chance you have a pr of those?
dave
mercator said:
🙂
My buddy Bill Perkins built an aweful lot of the S90s for the guy that had the little shop in the Westbrooke (?) Mall. Any chance you have a pr of those?
dave
p3a pics
Ok, ok, here are a couple of shots of the new amp. The case is red oak with 1/4" aluminum base plate and steel top grill. Finished with watco danish oil stain (walnut) it came out pretty nice. The led on the front switches from red to green when the soft start circuit engages (very cool!) - thanks Paulb.
Dave
/note the correct geographic placement of the assembly aids 😎
Ok, ok, here are a couple of shots of the new amp. The case is red oak with 1/4" aluminum base plate and steel top grill. Finished with watco danish oil stain (walnut) it came out pretty nice. The led on the front switches from red to green when the soft start circuit engages (very cool!) - thanks Paulb.
Dave
/note the correct geographic placement of the assembly aids 😎
Attachments
p3a pics
One more showing the innards. The transformer is a hammond 300va with +/-30V secondary. Caps are 68000uf computer grade. Lots of salvaged parts used, mostly from old computers. I used AT power switches for the speaker selectors and the on/off switch. I added the fan during testing cause that heat sink might not be big enough
Dave
One more showing the innards. The transformer is a hammond 300va with +/-30V secondary. Caps are 68000uf computer grade. Lots of salvaged parts used, mostly from old computers. I used AT power switches for the speaker selectors and the on/off switch. I added the fan during testing cause that heat sink might not be big enough
Dave
Attachments
A great looking amp AND a Tek 2465...
I give up, I just can’t keep up with the all you DIY people...
I give up, I just can’t keep up with the all you DIY people...
I'm jealous too. I'll feel a little better when Dave pays me for all the parts he used from my inventory.Da5id4Vz said:
Just let me check retail on that Hammond transformer, Dave...
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