tag:blogger.com,1999:blog-6847048658257278783.post4511410294011505150..comments2024-03-28T18:53:30.726+00:00Comments on Guitar FX Layouts: Hornby Skewes Zonk Machine IIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-6847048658257278783.post-11868186277183342112021-03-26T03:10:17.545+00:002021-03-26T03:10:17.545+00:00I was wondering the same thing. What resistors bia...I was wondering the same thing. What resistors bias the tranny's? Also, if you play with one, does it affect them all?ManicStrat2112https://www.blogger.com/profile/06899304836631611818noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65722249982595488902018-12-28T22:00:10.572+00:002018-12-28T22:00:10.572+00:00Built one, tried the bunch of PNP germaniums I hav...Built one, tried the bunch of PNP germaniums I have, the sustain seems a bit low still. Is there a certain voltage/bias resistor I can play with that might fix this issue? ThanksAnonymoushttps://www.blogger.com/profile/04107543655327299438noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-170253870639512212017-05-28T23:10:58.273+01:002017-05-28T23:10:58.273+01:00No probs man tag it too!No probs man tag it too!OcularDawnhttps://www.blogger.com/profile/15692163673995532387noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-75730496316343318132017-05-28T21:45:11.445+01:002017-05-28T21:45:11.445+01:00Did not catch that the transistors are mislabeled ...Did not catch that the transistors are mislabeled in the notes. I'll fix it later. Thanks Phil. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-48107860771934632902017-05-28T21:00:25.837+01:002017-05-28T21:00:25.837+01:00In Layout 2 the transistors have not been updated ...In Layout 2 the transistors have not been updated to NPN type but the layout is correct in regards to polarity (negative ground).OcularDawnhttps://www.blogger.com/profile/15692163673995532387noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-5088457888647275162017-05-28T13:48:52.195+01:002017-05-28T13:48:52.195+01:00Looks like Layout 1 = Layout 2 to me. I don't ...Looks like Layout 1 = Layout 2 to me. I don't have time to build *anything* at the mo (grr) but this one's gone on my list.helveticathttps://www.blogger.com/profile/16609942218165613991noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-37231155159399618122017-05-24T18:45:51.139+01:002017-05-24T18:45:51.139+01:00Verified PNP version. Took a while to get it tuned...Verified PNP version. Took a while to get it tuned. As usual with MK1-esque circuits it took a fair few trannie swaps before it started to sing. Settled (for now) on Q1: OC75 (~80 hfe) / Q2: NKT275 'reissue' (~100 hfe) / Q3: OC75 (~80 hfe). For the sizzling bacon noise that seems to plague these builds try a cap on the input > ground. 1nf removed the artefacts without killing the highs. With this pulldown cap in place transistor swapping can be more forgiving. Plus, the original 1nf input cap resulted in a rather tinny sound so I bumped it up to 10nf and now its beefier with a stronger midrange. Nothing out of the ordinary but it may help out first time builders of this circuit. Thanks Zach.OcularDawnhttps://www.blogger.com/profile/15692163673995532387noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-30884255041121568152017-05-01T16:28:47.958+01:002017-05-01T16:28:47.958+01:00Oop. Put up the wrong layout. I had 2 going, tryin...Oop. Put up the wrong layout. I had 2 going, trying to make it how I wanted it. I'll put up the right one when I get home. Nice catches. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-75409796955575829652017-05-01T14:34:24.124+01:002017-05-01T14:34:24.124+01:00Couple errors on the layout the 1m restore goes to...Couple errors on the layout the 1m restore goes to the other side of the 1n at the base of q1, the 25uf connects to the emitter not the collector of q1 and the 2m2 connects to thw Junction of 47nf and 56k not the ground and swell 3 goes to outputAnonymoushttps://www.blogger.com/profile/16115242545618392011noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-47689167530257154482017-05-01T10:22:21.023+01:002017-05-01T10:22:21.023+01:00layout has no output labelled layout has no output labelled NHTMFhttps://www.blogger.com/profile/09909622983077036856noreply@blogger.com