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Type: Posts; User: HoGo

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  1. Replies
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    Re: crack in top, F model

    I reread the OP and he asked about instruction...
    There are always frets.com and I would suggest looking for violin repair vids for cracks but you have to forget the comfort of having the plate off...
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    Re: What is this wood figuring called?

    They are everywhere in the spruce wood, but they are best visible when you cut exactly along them (e.g. radial direction from core of tree towards bark) few degrees off and you see nothing. On...
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    Re: crack in top, F model

    I'm huge proponent of HHG for wood joints of musical instruments (over Titebond and such) but in some cases there are other choices that are similarly effective.
    There are many varieties of CA and...
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    Re: crack in top, F model

    I would bring it to competent mandolin repairman and prefer regular hot hide glue for repair, I don't think you can get as good penetration with Titebond unless it is diluted (e.g. weakened).
    Good...
  5. Thread: "Powerful/Loud!"

    by HoGo
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    1,780

    Re: "Powerful/Loud!"

    Some of the posts above confuse directionality with projection. Even the loudest mandolins will be heard less from behind the back than from front.
    If the instrument has no volume to start with it...
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    Re: crack in top, F model

    Guitar top would cave-in badly with too low humidity (because the top is shrinking more across than the bracing along its grain) and ultimately crack. rehumidifying would put the top back into flat...
  7. Thread: "Powerful/Loud!"

    by HoGo
    Replies
    33
    Views
    1,780

    Re: "Powerful/Loud!"

    Latest researches ov violin "projection" revealed that violins that project well are also loud under ear. If I remember correctly there were no violins that felt quiet but projected well. IMO, among...
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    Re: crack in top, F model

    Picture is worth 1000 words...
    The first thing I always do is investigate WHY the crack appeared and decide upon solution from there. If it is humidity crack you need to consider rehumidifying whole...
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    Re: Measuring the top/back through soundhole.

    From my making I think both wod properties and "architectural ones" are both important though you can only measure some of them on finished instrument (you cannot measure stiffness directly) so we do...
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    Re: Measuring the top/back through soundhole.

    Thanks Fscotte. I thought you made one from scratch.
    I was thinkong about hooking magnetoresistor on audio jack and process the signal via audio input/output of smartphone. WIth some calibration you...
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    Re: Measuring the top/back through soundhole.

    What sensor did you use? I've seen versions with magnetoresistor or Hall effect sensor...

    BTW, I don't remember name but there was another version of magnetic gauge by some guy in OZ if I remember...
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    Re: Measuring the top/back through soundhole.

    Here is my old magnetic "Lipstick gauge" I made some 15-20 years ago. The tip is made of plastic syringe (relatively soft PE, doesn't scratch finish) Body is of transparent lipstick (with strong...
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    Re: Measuring the top/back through soundhole.

    There have been many previous threads about this. Here is one that has some interesting info on home made versions, both electronic and mechanical. I personally converted transparent lipstick into...
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    Re: Plexi for templates

    I also use clear plexiglass templates, 3 or 4 mm thick. I scribe lines with sharp pointed tool and cut roughly with deep throat fret saw with roughest blades I can get - I prefer scroll saw blades...
  15. Re: Is there an ideal Radius Setting for mandolins?

    I had a customer few months ago with his electric guitar with problem with bent strings, when he bent string (he commonly does 2 semitones and in few cases even 3 semitone bends) the string got muted...
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    Re: Machining/Routing Celluloid

    You can also do a test piece out of PVC sheet and see how the cut edges behave, if the chips fly away and leave clean surface it is ok if they remain fused to the edge by the heat you are going too...
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    Re: Valuing a Gibson by Dr Lori

    I hope she doesn't charge for the appraisal by the value of the item...
  18. Thread: 1918 f4

    by HoGo
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    Re: 1918 f4

    Nice catch! Doesn't appear to be refinished. Most refinishes done by Gibson were darker to hide any old stain spots and the binding height looks unaltered.
    Is the bridge original to the mandolin? Is...
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    Re: 1915 Gibson A Pickguard issue

    Good work!
    I believe the holes are angled for clearance for a drill chuck. I think, originally the guard nails were just snug sliding fit into holes and the rust locks them in lace after some time....
  20. Thread: tailpiece cave-in

    by HoGo
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    Re: tailpiece cave-in

    The forces within the whole structure cannot be isolated. It all works as a system. you look at the crossection of mandolin it looks kind of like a bow (shooting) with a tillering stick between bow...
  21. Thread: tailpiece cave-in

    by HoGo
    Replies
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    941

    Re: tailpiece cave-in

    Just imagine the shape of top and the tension of strings (~150 pounds total) the curve between bridge and tailpiece is S shaped (concave-convex) and the tension is trying to compress the top. In some...
  22. Thread: tailpiece cave-in

    by HoGo
    Replies
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    Re: tailpiece cave-in

    Thin top mandolins are suspectible to changes in humidity or tuning like you describe. Were the block loose you would see the open separation between back and ribs under the tailpiece.
  23. Thread: staining

    by HoGo
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    Re: staining

    You are going to trim the back to the rim and install binding? that would remove wood with stain and you would have to repair the stain.
    Some top violin makers do start their staining/ sealing...
  24. Thread: Binding laminate

    by HoGo
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    Re: Binding laminate

    ABS can be glued using acetone as well. I've used thin CA for laminating even for celluloid with good results (especially adding thin BW accent to create side-binding a'la Monroe). Acetone can cause...
  25. Thread: tailpiece cave-in

    by HoGo
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    941

    Re: tailpiece cave-in

    Agree with above. Often both come hand in hand. Weak top allows "folding" of the top at recurve and resulting rotation of bottom block will separate it from back (below tailpiece). Much less often...
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