woodworking

Some photos from construction of the case for my 2nd prototype.

This shows my new Ryobi table saw, being used to do some routing work, effectively.  The cutout for the Jensen speaker allows the vertical spacing to be really tight, enabling final cabinet dimensions of 9.75x9.75 inches (7.25 inches deep).  This type of concave carve would have been hard to do without the new saw (prototype 1 has a similar carve, but much more primitive in execution and nothing I'd want to "sell").

First job when I got the saw, was to build a sliding table for it.  I don't know why this isn't a commonly-available accessory for this type of saw, in general.  But no, seems to be traditional that woodworkers always build their own tables, of various designs.  There's tons of videos about this on youtube, etc..

(I didn't use this table for the carve illustrated here, I'm just showing it because the saw's not complete without it, IMO.)


By clamping the piece securely to the rip-fence, bringing the blade up into the piece while running, and moving the fence over with progressive cuts, I'm able to make this carve, perfect for the outline of the speaker, which will leave the top surface of the crossbar looking smooth and perfect once it's in the amp.



Circular cutout in the front face is 5.125 inches in diameter.  Outline of speaker frame is 6.5 inches in diameter.


Comments

Post a Comment

Popular posts from this blog

schematics and layout diagrams

Image
I'm posting rough copies of the schematics again (just photos), including I think a few minor changes and corrections over the "nicer" copies posted a while ago.  Also, for the four pages comprising the preamp section, I have now made layout diagrams: i.e., slightly re-factored schematics which more clearly suggest how the circuit board and wiring will be laid out. 
Read more

quick-start guide for the version-1 prototype

Image
McGrath Mini Quick Start Plug guitar cable and power cable into the back. Flip all the switches into the "on" or up positions, except for the fx switch: keep this one down. (back view) 5 switches on, 1 switch off ( fx ). Since this is a tube amp, you'll have to wait a bit for the tubes to warm up, before you can get any sound (around 15-30 seconds).  When the amp is warmed up, the power LED changes from red to purple. Start with all the knobs pointing straight up ("12-oclock position"), except vol : start with this at minimum (full CCW). (front view) Strum a chord on the guitar while gradually turning up vol  until the volume is good. The most important knobs other than vol , in setting the tone of the amp, are the two  gain  knobs.  Experiment with these.  More gain leads to "dirty" or distorted tones; reduce gain for "clean" tones. Dirty tone: Semi-clean tone: Experiment with the rest of the knobs, and with different settings for the switc...
Read more