who makes the loudest low f whistles?
Dunno about loudest, but my Alba low-F comes in just slightly louder than my Chieftain low-F on a meter. Truth is though, it’s only by a very small amount.
If you really want volume, flutes are the way to go.
i think a nice lady from scotland makes them very loud! http://www.albawhistles.com/
edit: and i forgot colin goldie 
Colin Goldie makes, by far, the best Low F whistle on the planet, seriously. Don’t know if it’s actually the loudest, but I’ve yet to hear anyone complain about a lack of volume.
If you want the loudest Low F, maybe you can ask Colin to make you a Low F out of Low D diameter tubing 
Loren
patrick d’arcy (usually posts on the UP forum) has a copeland low f. i am sure he knows how it compares with others in terms of volume
meir
Actually, I think that would make it softer. Certainly the larger-diameter whistles I have are much more mellow than their narrow counterparts.
I sure like my blue anodized one. 
Carol
This is very interesting. I have suspected that large boresize does not mean louder volume, and I am currently testing a couple of whistle that seem to confirm this. Any more info on this?
This I would say is the case, 
now windy ways 
that’s a differant matter
Well, I don’t want to speak for Mr. Goldie, or any other maker, however bigger bore generally does mean greater volume - lot’s of examples out there: Some Overton G whistles were made from the same tubing as the F whistles (if I’m not mistaken) and the G whistles were significantly louder.
Anyone here ever played an older Chieftain C whistle? One of the loudest whistles I’ve ever played - Those things were made out of tubing that most makers would use to make Bb or A whistles!
Are “Narrow Bore” whistles from a given maker louder than their standard bore siblings, hardly.
I’m not saying that a whistle with a narrow bore can’t be louder than a whistle with a wider bore, but all things being equal (design) - bigger bore is going to mean louder.
Loren
As a matter of fact… Yup, same tubing as for the Chieftain A.
So I put the Chieftain C on the tuner against a Chieftain D.
Interesting results. Subjectively, the D sounded louder. On the meter, however, the C was louder at the same frequencies. The difference is that the C had a much “softer” tone to it.
Also interesting, while the A has a lower volume for the same note positions (bell note vs bell note) than the C, it is louder at the same frequencies.
Hey,
you can call me Colin… I think.
As far as the design of whistles I make I would go with Loren. I cannot speak for other makers though. The Alto G (bigger bore) is significantly louder than the smaller bore G, same with the Tenor E in small and big bore, the Mezzo C I changed to Soprano C because I found it TOO loud. I also make the Low C in bigger and smaller bore, same still applies. The bigger bores give the notes a bigger depth of tone and may make it sound more mellow but it is still louder. They can also sound completely different and play different. If I was asked for a choice it would be hard as it would depend what mood I am in at the time and also the tune I am playing.
The F on a bigger tube from what I am using would be louder but I would probably not use the Tenor tube but something in the middle. To make a whistle louder than normal I find the easiest to do is to make some alterations to the mouth piece as far as the height of the wind way, the width of the vent and the also the angle of the bevel and of course making the tone holes bigger.
Hope that helps.
Colin
Heh heh, I was kidding about using D tubing for an F, of course 
But I’m sure you knew that Mr. Gol… er, Colin
Loren
So please can you guys.
Explain to silly me, why the Q1 and the standard Soprano D 's that I make out of the same size tube, have different volumes, the only thing that is different is the size{volume} of the wind way
Umm, What’s a Q1?
By the way, nice banner ad there in your avatar box…
Loren
I presume that is one of the reasons then. Is everything else EXACTLY the same?
Colin
Hey Loren. The Q1 is a really neat whistle that Stacey first called the “practice” whistle, but since we all agreed it was too good for such a monicker, it became the “Q1.” (Ok, maybe it’s supposed to be the “quiet one” or something; anyway, really nice elegantly simple whistle that is very different from the “regular” Alba soprano D you’re familiar with).
Regards,
PhilO
Phil,
Ah, I see, thanks. I also see you still haven’t met a whistle you didn’t like
Just kidding man, hope all is well in your world.
Loren
The best low F. Well how do you choose between a Grinter and an Overton? You don’t, you own one of each.
The loudest low F? Get yourself an Olwell bamboo number. OK, OK, I know that’s a flute but you did ask.