Something stirs in the Undergrowth

Dedicated to those large boxes at one end of the room
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IslandPink
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#2356 Re: Something stirs in the Undergrowth

Post by IslandPink »

Thanks.
Meanwhile some tidying-up with another order from HiFi Collective -
Just running-in cap now with some Talking Heads ( Naked )
Zobel_final.JPG
"Once you find out ... the Circumstances ; then you can go out"
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IslandPink
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#2357 The wonderful world of clipleads : No. 14

Post by IslandPink »

Some more increments.
Friday, got speakers running with new zobels and had some listening - coming along nicely.
Today, got the 300B amp breadboard ( v.dusty ) out and re-instated the low-pass filter on left channel, with some mods. 4k on pot, 2400pF to ground. With zout of pentode ( ~7.5k ) this gives approx. 5.7KHz low pass to the bass and mids.
I also wired the right channel to the same stereo pot ( they have been separately adjustable ) now that both channels will be doing the same thing.
Left tweeter was furnished with existing high-pass filter, 0.68mH across terminals, and 3.9uF to positive, that's a transitional filter with main 1st-order cross around 5kHz.
I got the tweeter amp over, found one litz speaker wire, and clip-leaded an interconnect to the left channel volume pot.

So playing now, and sounding very tasty indeed, if I do say so myself. Finally feels like the work has been worth it.
System_1tweeter.JPG
Now I just need to get a low table to put over the main power supply, to hold the tweeter amp in a useful place, then I can go stereo ( if I can find the other litz speaker wire :roll: )
"Once you find out ... the Circumstances ; then you can go out"
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Nick
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#2358 Re: Something stirs in the Undergrowth

Post by Nick »

Interesting how few horns you have ended up with considering the journey.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
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IslandPink
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#2359 Re: Something stirs in the Undergrowth

Post by IslandPink »

Ha ha - good point. But this is 'end of part 1'
The horns come back in part 2.
"Once you find out ... the Circumstances ; then you can go out"
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pre65
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#2360 Re: Something stirs in the Undergrowth

Post by pre65 »

Nick wrote: Mon May 06, 2019 7:57 pm considering the journey.
Only 10 1/2 years. :lol:
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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IslandPink
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#2361 Re: Something stirs in the Undergrowth

Post by IslandPink »

Education doesn't come cheap.
Took Kevin Scott 30 years to perfect the Vox Olympian.
"Once you find out ... the Circumstances ; then you can go out"
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izzy wizzy
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#2362 Re: Something stirs in the Undergrowth

Post by izzy wizzy »

pre65 wrote: Mon May 06, 2019 8:17 pm Only 10 1/2 years. :lol:
It's all about the journey. I can't say anything about how long things take :lol:

Well done. Hope you find that lead. Under the computer again?
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Ali Tait
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#2363 Re: Something stirs in the Undergrowth

Post by Ali Tait »

Good effort! :D
Cressy Snr
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#2364 Re: Something stirs in the Undergrowth

Post by Cressy Snr »

Shoddy I say. :occasion5:
Sgt. Baker started talkin’ with a Bullhorn in his hand.
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izzy wizzy
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#2365 Re: Something stirs in the Undergrowth

Post by izzy wizzy »

Keep coming back for another look. Fantastic work. Really like the way the crossover box sits in the side panel.
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IslandPink
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#2366 Re: Something stirs in the Undergrowth

Post by IslandPink »

Thanks.
I do have 3/4 of a great horn system done.
Next build will be Cornet double-horn for 5" driver - as test of principle.
izzy wizzy wrote: Mon May 06, 2019 8:37 pm Well done. Hope you find that lead. Under the computer again?
'fraid not - the little box of goodies has run dry.
"Once you find out ... the Circumstances ; then you can go out"
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IslandPink
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#2367 Re: Something stirs in the Undergrowth

Post by IslandPink »

I found the wire ! I found the wire ! :D
"Once you find out ... the Circumstances ; then you can go out"
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pre65
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#2368 Re: Something stirs in the Undergrowth

Post by pre65 »

IslandPink wrote: Wed May 08, 2019 7:54 pm I found the wire ! I found the wire ! :D
Where was it ?
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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IslandPink
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#2369 Re: Something stirs in the Undergrowth

Post by IslandPink »

In retrospect, it was obvious.
Instead of putting it in the blue box ( from Bud Purvine ) with the left speaker cable and some interconnects, I put it under a spare duvet and a couple of pillows on the bed in the 2nd-floor bedroom, near the valve wardrobe. Should have remembered !
"Once you find out ... the Circumstances ; then you can go out"
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izzy wizzy
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#2370 Re: Something stirs in the Undergrowth

Post by izzy wizzy »

Woohoo! Does that mean stereo now?
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