Search found 564 matches

by peter.coombe
Fri Mar 15, 2019 8:59 pm
Forum: Instrument Builders Forum
Topic: More mandolin thoughts
Replies: 9
Views: 512

Re: More mandolin thoughts

One thought that has occurred to me since the first post - the Lyon and Healy type mandolins that I made have a different bridge from the more recent mandolin of my own design. The bridge is quite a bit lighter. That could explain why the difference is consistently 3.5 semitones rather than 4 semito...
by peter.coombe
Tue Mar 12, 2019 3:00 pm
Forum: Instrument Builders Forum
Topic: More mandolin thoughts
Replies: 9
Views: 512

Re: More mandolin thoughts

I am happy to have a chat with you at the NFF.
by peter.coombe
Sun Mar 10, 2019 7:35 pm
Forum: Instrument Builders Forum
Topic: More mandolin thoughts
Replies: 9
Views: 512

Re: More mandolin thoughts

Thank you Graham. I was beginning to wonder if anyone would take any notice, but you did and you nailed it. When I have more data I will write it up properly and submit to the GAL for publication because it is an important finding if correct. That is assuming the new data continues to support my hyp...
by peter.coombe
Thu Mar 07, 2019 9:59 am
Forum: The Gallery
Topic: First Classical
Replies: 8
Views: 418

Re: First Classical

Thanks, that is good information. In Port Fairy at the moment, and don't have my records, but from memory I think the main air mode came in at between F# and G, and 2.5 semitones between the main top and main back mode. When tapping the bridge before the stings went on there was a really big woof ou...
by peter.coombe
Tue Mar 05, 2019 11:07 pm
Forum: The Gallery
Topic: First Classical
Replies: 8
Views: 418

Re: First Classical

So kpart, how do you get the weight down on the bridges? Can't remember if I made the top thinner than the plan, half way to Port Fairy at the moment so can't check, but I think I did, the Swiss Spruce was quite stiff along the grain. What I do remember is that the fan braces were really small. What...
by peter.coombe
Tue Mar 05, 2019 10:49 pm
Forum: Instrument Builders Forum
Topic: Port Fairy Folk Festival
Replies: 5
Views: 427

Re: Port Fairy Folk Festival

Yep, halfway there already.
by peter.coombe
Tue Mar 05, 2019 10:47 pm
Forum: Instrument Builders Forum
Topic: Tapping boards!
Replies: 14
Views: 655

Re: Tapping boards!

Any music instrument with a wooden box and strings follows the same physical principles. Those principles are outlined in the books. The frequencies will be different for different types of music instruments, but the principles remain the same. Apply the principles and you will most likely end up ma...
by peter.coombe
Mon Mar 04, 2019 5:24 pm
Forum: Instrument Builders Forum
Topic: Tapping boards!
Replies: 14
Views: 655

Re: Tapping boards!

Read the Gore/Gilet books. All is explained there.
by peter.coombe
Mon Mar 04, 2019 1:34 pm
Forum: The Gallery
Topic: First Classical
Replies: 8
Views: 418

First Classical

This is my first classical guitar. It has taken around 3 years, rumbling along slowly in the background. Made the big effort to finish it for Port Fairy. Glad I did, I like it, and so far it has kicked the behind of every other classical guitar I have had access to. A customer told me he had a "wond...
by peter.coombe
Mon Mar 04, 2019 1:06 pm
Forum: The Gallery
Topic: Tenor guitar
Replies: 3
Views: 242

Re: Tenor guitar

Case arrived today at the last minute, so if you are going to Port Fairy I will have it there.
by peter.coombe
Mon Mar 04, 2019 1:04 pm
Forum: Instrument Builders Forum
Topic: Acoustic cases
Replies: 5
Views: 378

Re: Acoustic cases

Hiscox for OM guitars. I used Presto for custom cases for odd instruments, but they have closed down "temporarily".
by peter.coombe
Mon Mar 04, 2019 8:40 am
Forum: Instrument Builders Forum
Topic: More mandolin thoughts
Replies: 9
Views: 512

Re: More mandolin thoughts

Here is a picture of the main top mode on the latest mandolin. You can see the fingerboard extension over the sound hole. Without it the main air mode was bang on G#, the fingerboard extension lowered it about 1/2 semitone. Mandolins are a bit more complicated than guitars because there is a tailpie...
by peter.coombe
Sun Mar 03, 2019 11:22 pm
Forum: Instrument Builders Forum
Topic: More mandolin thoughts
Replies: 9
Views: 512

Re: More mandolin thoughts

Forgot to mention that the last mandolin I measured with the interval of 4 semitones, recently finished, sounds devine. About as close to the perfect sounding mandolin I have ever had the pleasure of playing. I went through a similar process as in the book i.e. what is the perfect mandolin, and rede...
by peter.coombe
Sun Mar 03, 2019 11:16 pm
Forum: Instrument Builders Forum
Topic: More mandolin thoughts
Replies: 9
Views: 512

More mandolin thoughts

Following on from the other mandolin thoughts thread which referred to my flat top mandolins, I have been measuring some arch top mandolins. The results have been very interesting. Firstly some background. Many years ago I began measuring free plate modes in archtop mandolins after reading up on som...
by peter.coombe
Sun Mar 03, 2019 12:17 pm
Forum: The Gallery
Topic: Tenor guitar
Replies: 3
Views: 242

Tenor guitar

I am calling this tenor guitar the Gillian Alcock special in memory of my great friend and colleague Gillian Alcock who passed away in November last year. The top is made from King Billy Pine from Gillian's last King Billy plank from our tree we purchased in 1997. If she had not been forced to retir...
by peter.coombe
Fri Feb 22, 2019 5:57 pm
Forum: The Gallery
Topic: Another not a guitar
Replies: 4
Views: 364

Re: Another not a guitar

Yep drives me mad as well. Last year I thought the case problems were solved, but then it all turned to shit. Maybe I should build classical guitars, no problems with cases so long as you stick with a standard shape and size. Hey wait a minute, I have just finished my first classical guitar, woo hoo...
by peter.coombe
Fri Feb 22, 2019 9:45 am
Forum: The Gallery
Topic: Another not a guitar
Replies: 4
Views: 364

Another not a guitar

Here is a mandola recently finished. All Aussie wood except for a bit of Ebony in the fingerboard, headstock, bridge and pickguard clamp. King Billy Pine top, Blackwood back, sides and neck, Myrtle pickguard and Ivorywood bindings. Sounds like a lovely sweet sounding mandola. I was hoping to have th...
by peter.coombe
Sun Feb 03, 2019 10:22 pm
Forum: The Gallery
Topic: Not a guitar
Replies: 3
Views: 489

Not a guitar

Latest mandolin from the workshop. An assymetrical two point, short scale (13in). Based on a Lyon and Healy I imported into Australia about 5 years ago, made around 1924. This mandolin is the sweetest and most gorgous sounding mandolin I have ever had the pleasure of playing so is very pleasing. Qui...
by peter.coombe
Fri Jan 11, 2019 10:55 pm
Forum: Instrument Builders Forum
Topic: travelling south
Replies: 2
Views: 734

Re: travelling south

I am in Bega. You are welcome to drop in and tour the workshop. I don't know of any timber suppliers down this way.
by peter.coombe
Wed Jan 02, 2019 7:55 pm
Forum: Instrument Builders Forum
Topic: Some mandolin thoughts
Replies: 3
Views: 856

Re: Some mandolin thoughts

Thanks Trevor Yep the principles in the book have now been applied in the mandolin world, but whether or not anyone in the mandolin world actually takes any notice is another question. Tradition is a powerful thing. It has been a bit of, duh why didn't I think of that before. I have read the books, ...
by peter.coombe
Mon Dec 31, 2018 9:39 pm
Forum: Instrument Builders Forum
Topic: Some mandolin thoughts
Replies: 3
Views: 856

Some mandolin thoughts

In a thread a few months ago I presented a pancake type of mandolin with a Gidgee back and sides, and asked if any had used Gidgee because it sounded better than any other pancake flattop mandolin I had made. Trevor Gore commented that with Gidgee, the back would be a dead back because it was so hea...
by peter.coombe
Thu Dec 27, 2018 9:14 am
Forum: Instrument Builders Forum
Topic: Timber identification
Replies: 14
Views: 1848

Re: Timber identification

Looks like Queensland Maple to me.
by peter.coombe
Sat Dec 15, 2018 9:45 am
Forum: Instrument Builders Forum
Topic: Go-bar rods
Replies: 13
Views: 1584

Re: Go-bar rods

Me too. Dowel from Mitre 10, chopped up. They work fine, are cheap and only a couple have snapped. Easily replaced if they do snap.
by peter.coombe
Mon Nov 12, 2018 9:44 am
Forum: Instrument Builders Forum
Topic: Removing old shellac?
Replies: 8
Views: 1151

Re: Removing old shellac?

Yep, also done more times than I care to remember. Sometimes use a scraper, or alcohol, but usually sandpaper and lots ends up in the bin. Lots of sandpaper, lots of elbow grease, and lots of patience, but always I am happy I got it off and start all over again. Second attempt is always much better.