[pianotech] Hybrid pinblocks

erwinspiano at aol.com erwinspiano at aol.com
Wed Feb 17 09:15:01 MST 2010


HI Gene
  Well every one was doing it.   No, no, no... I owe TerryFarrell the thanks for motivation as he made me one of the quarter sawn versions and it tuned so well I was duly impressed... and the Canadian Double blocks were getting so spensive!. I wasn't always satisfied with the fit either. And Why not keep the money in the shop?
 I wanted a more consistent block that tunes like a Yamaha. I despise tight pins and wanted to gain control over the process. I have used both the delignit block material and the bridge cap material. Both are just fine. The bridge cap material is about twice as many laminations which I like but it doesn't come in a long enough sheet to cover the length of an entire block So the seam is placed between the tenor and bass tuning pin fields.When I run out of the block material I may try that again. 
  The added bonus of a block that solve pin hole enlargement over time was a great feature. In many blocks the pin holes are dangerously close to the block edge especially in the  bass. 
  I buy and machine my maple. I'm very fussy about the grain consistency. I can get 8 or 4 quarter that has very tight and consistency grain. Much more so than what I was buying but that's always the value added feature of any customized work .I have found it about impossible to buy or order wider quartered material and although it may sound like too much trouble I can usually machine enough material for glue into up in double panels ready for pressing in about 4 hours. I made shop built clamps to edge glue the material
  I have not altered the drilling technique. It is however important as Terry said to test each block with test pins. Maple varies in hardness and some no. 2 pins will be too tight drilled at .257 and others better at .261.
   I went to the trouble of making an air hose press to do the glue up. It's been stiffened a time or two and now glues a really flat panel. Quite a learning curve doing it my way.
  Is it worth it?

  The outcome is far better than I hoped. Love tuning these blocks--
  Dale









Hello,
I am very curious about hybrid pinblocks and those that have made and used them.
What materials were used, how did you decide on the materails and their proportions. 
What was the intended purpose and did you achieve the desired result? 
Did you alter your drilling technique for the hybrid?
Overall, do you think the extra work was worth it?
Do you use a bandsaw to fillet the different blocks and what size is it - virticle capacity for cutting.
Thanks for sharing your thoughts.
Gene

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