Frugel-Horn XL for Alpair 10.3/10p, Fostex FF165wk, more

[planet10]

If I make a donation - is it possibly to get the plans for FHXL?

email me Olav. We still need some beta testers on the plans, no donation yet required

dave

 

[chrisb]

The throat of a horn is either the sealed end of a chamberless variety, or the initial cross section of the horn proper leaving a low pass filter chamber (the only purpose of which is exactly that, albeit sometimes forgotten by the term 'compression chamber' being misapplied. Compression chambers are the sealed chamber loading the rear of a driver in a front horn).

in the case of something like a tapped BLH such as FHs, etc, the room could even be considered the "compression chamber" - I'm not sure if that's even a jest

 

[planet10]

in the case of something like a tapped BLH such as FHs, etc, the room could even be considered the "compression chamber" - I'm not sure if that's even a jest

It is not. Something i 1st saw Scott express.

dave

 

[Scottmoose]

It is not. Something i 1st saw Scott express.

dave

Right; no jest at all, that's exactly what they are. It was GM who first pointed it out to me a few years back. Arguably abstract since the volumes in question are large enough for the loading on the front of the cone to be relatively insignificant, but the principal still holds.

 

[planet10]

Finally got a visualization done.

dave

 

[chrisb]

gee, looks just like an FH3 on HGH (horn growth hormone) - I wonder how large a version for the 12P might be
"honey, I shrunk the listening room"

 

[planet10]

I wonder how large a version for the 12P might be
"honey, I shrunk the listening room"

Large enuff that Avebury is more practical

dave

 

[chrisb]

well I actually knew that already, was just being silly

 

[OlavHaal]

Ply --- ply ???

Hi Dave or someone with solution...

Have the plans - made the donation - have the spirit... BUT - they have stopped making ply made of birch. And so much birch out in forest? I can get 18mm Pine(looks fine, but..). One vendor said he can get 12mm birch, so if I glue 6 and 12mm birch together it can work out fine.

But too much glueing before I can start on the real project - A Horn - Jippiay.

Shall I go for the 18mm Pine. It is softer, and not as nice artistically? Maybe veneer or paint after it is finished?

Anyone please help.

Best

Olav

 

[planet10]

Olav,

The birch is not all that important, what is important are the number of plies. The guys in Australia are using hoop pine ply (17mm IIRC). You willlikely be just fine.

dave

 

[OlavHaal]

Tnx Dave

Olav,

The birch is not all that important, what is important are the number of plies. The guys in Australia are using hoop pine ply (17mm IIRC). You willlikely be just fine.

dave

Yea

Had a feeling that it could be like your answer gave --- and the sound from my old Fonken-like Alp10.2 is harder (knock - knock) compared to other I have built in wood from birch - which have a softer tone. So maybe the PinePly will have a more of a rounded and tubey feel.

My wife enjoys more my old FR125S with tweeter in Fonken made of 18mm birch - than my distinct and very revealing Alp10.2 in Fonken 18mm Oak.
They have a softer and more forgiving tone. Very easy to listen to.

Thanks again Dave

Best

Olav

 

[lorienblack]

I would make the FHXXL if my front room was large enough. Then make my money back charging for admission to view, and the mark up on snacks and light drinks.

 

[pehajope]

I´m still waitig for my wooden parts.

 

[lorienblack]

Ok lads, I've done the Maths and a quick mock up. Plans available on request

 

[jln]

Ok lads, I've done the Maths and a quick mock up. Plans available on request

Megalithic

 

[lorienblack]

Now you've done it, it's been named and karmic law demands that it must be built.

 

[OlavHaal]

Hi again Dave!!

Olav,

The birch is not all that important, what is important are the number of plies. The guys in Australia are using hoop pine ply (17mm IIRC). You willlikely be just fine.

dave

Fetched my 2 sheet of PinePly(heavy) - and it is very nice!!

And with 11 layers Ply!
Should be ok I believe. Building will proceed fairly soon.....

Best

Olav

 

[lorienblack]

Apologies - the mock up below for the FHXXL 12p is a poor attempt at humor, I do not possess plans. If the Megalith ever gets on paper I'll be in the line with the other crazies looking to build a set

 

[planet10]

Megalithic

It should be noted that Maeshowe, Silbury, Avebury are the Megalith Series (ie that name taken already)

dave

 

[jln]

Indeed! 'twas but a jest and allusion to said series...