tropicalrips 0 Report post Posted January 13, 2004 completed second version of the NACA Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 13, 2004 back view Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 13, 2004 porn Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 13, 2004 more porn with 2 * 9v batt Share this post Link to post Share on other sites
augustineRS 0 Report post Posted January 13, 2004 how much you spend on it? Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 13, 2004 (edited) i think about the price of 3 cmoy i didn't build it with exotic parts so the cost is lower going to be tested by someone with a Grado Edited January 13, 2004 by tropicalrips Share this post Link to post Share on other sites
N@Z 0 Report post Posted January 13, 2004 That looks quite nice actually, simple yet effective. So far I like the look of this amp the best next to the previous black one. Nice touch heat shrinking the wire on the power switch, why not go all the way with the rest where possible? What volume pot did you use this time? You know what would be a great idea considering you have so much space in that enclosure? Recharegeable batteries inside the case, socket outside for hooking up for charging only & Hard wiring the circuit like Firefox. Share this post Link to post Share on other sites
av98m 0 Report post Posted January 14, 2004 (edited) Very nice, with all that extra space for you can eventually put in nicer stuff like the neutriks locking 1/4 " headphone jack, alps blue etc etc. Out of curiosity, what opamp are you using in this amp? Edited January 14, 2004 by av98m Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 14, 2004 NJM4556 op-amp i left out the exotic parts like neutriks 1/4 jacks due to cost, there's no single piece of component in the amp thats more then $20 all the expose contacts had been heat-shrink except the power jack cause its kind of an odd shape the volume pot has "made in UK" print on it, not sure what make is it. its a 100k log pot @ $15 each. thought of using blue Alps but use this instead to keep cost down i hav also thought of having the batts in the case, it should be able to fit 8 AA batts even 16 AA cause my board is raised from the floor of the case, so its actually only taking up the space of 2 screws on the case. if i hav batt inside the amp, that makes it portable rite i wanted a desktop amp to play with at home , also the case has 8 screws, no fun removing the cover to change batt i chose this case because i like the "low profile" look this is still a "test amp" phase, i'll put in more refinement into its next phase, like batt charging , 1/4 inch jacks , maybe an extra jack for driving 2 headphones Share this post Link to post Share on other sites
augustineRS 0 Report post Posted January 14, 2004 maybe a DC jack? Share this post Link to post Share on other sites
av98m 0 Report post Posted January 14, 2004 Hmm..now you have the same opamp and the big solen caps used in the ra1. It'll be interesting to hear how it sounds. Share this post Link to post Share on other sites
Rameish 0 Report post Posted January 14, 2004 I think that's an Omeg pot - made in the UK correct? Share this post Link to post Share on other sites
kenshinz 0 Report post Posted January 14, 2004 Rameish, the pot is bought from Burlington Square, the shop selling all the tube amp diy kits. It would be nice if you knew what it is. Cheers Share this post Link to post Share on other sites
N@Z 0 Report post Posted January 14, 2004 ... i hav also thought of having the batts in the case, it should be able to fit 8 AA batts even 16 AA cause my board is raised from the floor of the case, so its actually only taking up the space of 2 screws on the case. if i hav batt inside the amp, that makes it portable rite i wanted a desktop amp to play with at home , also the case has 8 screws, no fun removing the cover to change batt ... I meant, if possible design it in such a way you can leave the batteries semi-permanently in the case & it can recharged just by plugging in a wall wart without removing them. You could still use the external power source when not required for portable use without overcharging the internal batteries. Just a thought. Share this post Link to post Share on other sites
Sipher 0 Report post Posted January 14, 2004 Nice Amp! good work! Share this post Link to post Share on other sites