Australian/New Zealand Luthiers Forum

John
Thanks a lot for the reply. I will take your advice and check when strung up. I thought it was to be tested without strings on but as I said it’s my first time to try side mass so I will wait. Can I assume with those figures that you would be trying to get the 178 down to 170??
Dave

Hello Just wondering if someone could have a look at these figures from my 00 size guitar I just finished and comment on my query. This is my first time to try adding side mass Resonant frequencies with neck and bridge on are 105 (target 95) 178 (target 180) 219 (target 226) My query is re adding ma...

Thanks for that but how then do you get just the 104 main air to drop when the other 2 numbers are right now???
Also I only tried the blu tac to see what would happen As I wasn’t getting anywhere with shaving the braces.
I was amazed at the drop in the other 2 numbers with just 30g of blu tac!!
Dave

Hello all I had my TG style at 104 188 236 I tried shaving the back brace to bring the numbers down but didn’t seem to be having much effect... Just for fun I put 30g of blu in 2 pieces ON the top and below the bridge as TG did on the video and look at the numbers now... 103 179 224 Guitar even soun...

Thanks again Can I confirm a few things before I take to the tools again... 1 All test were done with guitar finished ( lacquered/bridge/ strings on as in TG Video) 2 To bring 97 down to 95 you say weights but I haven’t put in side mass blocks into the guitar so will reducing the back brace do that ...

Thanks for the response My question now is according to 22.3 in Book 2 the "...main cavity resonance and the main top resonance must not be exactly an octave apart.." 1 My main body is 97 so am i right in saying it should be 95 ( between 2 semi tones)?? 2 My top is 177 so should come down to 170 (be...

Hello all I have done my tests ( pic attached) on my 1st TG style guitar and my Martin OM 28. As I said I really love the Martin guitar sound ( bought new this year) and wanted to see if I could measure my results against it and learn something. The pic showing all my results is below. I’m afraid it...

Thanks Dave. I am going to do all tests on mine and the Martin at the weekend and will be getting back to you all for a few tips to see what the most likely culprit is in my not too great sounding build!
Dave

John Thtats really great that you took the time to respond in that detail...much appreciated and I will be saving that info for my next build! I am slightly puzzled now in that I am not too impressed with the sound ( I tend to compare my sound to the Martin 00 28 ) but yet the figures appear good......

Sorry my mistake! I used exactly 1 kg weight
Dave

Hello all I would really appreciate some feedback here as I have built a TG method guitar and not too happy with the sound. If someone could help me out with a few tips it would be great! Here goes.. The guitar is a 00 type 14 fret steel string Response with strings on etc are as follows 97 Hz with ...

Thanks for the replies, I have been away and will try pick up them tips when back in the shop
Dave

Thanks for the replies I will check out those ideas for sure
Dave

That’s a great idea. If you have a pic of any of the ideas please send! Sanding the rims can be hard going I find and also my side bending could do with a bit more accuracy. I have the sides in the mould and dish underneath when sanding but I see a lot of people have the dish on top and a 25mm pipe ...

Oops I forgot the excel screenshot!

Hello I have just closed the box on my first TG method guitar and done the tests. I am wondering if 1 I am reading the right peak for the back? 2 Should I sand further the top or expect it to drop from 200 to 180 when neck and bridge are on? I am going by 12-18 in bk 2 where it is expected that numb...

Hello I am trying to up my game as an amateur guitar maker and would like a motorised sanding dish ( I have the dish already) and also a reasonably priced side bending jig that would also help me bend my own wood bindings ( I have a heat blanket and made my own side mould for bending which works but...

Hello all I am doing my first TG guitar ( l have used the 2nd book a LOT and it’s great but very nervous of the whole test thing..) and wouldn’t mind if someone could check my list below and correct me if I am missing anything?? 1 Thickness the panels ( I am happy with this now and thanks to the hel...

Funny story .. When I was serving my time as a carpenter the foreman would always make us take 15 minutes around 4pm each day when the place would be messy and do a clean up. It used to drive us mad but now 40 years later I do it all the time in my workshop and have a portable battery hoover that I ...

Hello there This is a subject I think about a lot (too much no doubt!!) I build as a hobby first of all. I have built approx 20 guitars...some good some not so good, since 2015. As they have got better I have begun to donate them to various causes. Some went to the local music college who gave them ...

Very bad English there..!! I meant to say I am good to go I am going to try a live back as well so will use the correct value of 55 as per the book. Really looking forward to this now so hopefully it will go ok even though I am not too sure of what’s next Re the x bracing and if any tests required a...

Hello
I have now adjusted my excel sheet to match the formula for thickness and I am getting the same result as the screenshot so I cannot hunk I am good to go
I will do a live back now that I am doing the TG method on this guitar so is the thickness spreadsheet ok for that as well????

No problem Martin I know you are busy. I have a google docs sheet now and will try and relate that to my excel and come back to you if still stuck
Dave
Ps I hope all this is worth it in the end!!! Ha ha

Hello
I cannot upload my spreadsheet not can I see the formulae in the Google Docs sheet...
If someone could have a look at the thickness formula in this screenshot as I think the error might be there.

Thanks Trent but I didn’t see anything until now as I never used that facility before! Thanks I will check out and let you know.
Dave