tag:blogger.com,1999:blog-6847048658257278783.post7199625107948156909..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Runoffgroove EighteenIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger14125tag:blogger.com,1999:blog-6847048658257278783.post-48916705075557511192015-02-06T22:06:22.862+00:002015-02-06T22:06:22.862+00:00Update: Fine-tuned my built these last couple days...Update: Fine-tuned my built these last couple days and I got a major improvement. My pedal was veeery noisy, so I decided to try some shielded wire, after succesfully using it in another build. Didn't work. After messing with the voltages a bit more I came to the conclusion the trimpots were to blame - they just didn't hold a value - as I turned them, the voltages went everywhere and there was this static noise (guess I got a bad batch from Tayda, this happened before). So I removed them and used regular pots to trim the drain voltages - voila, no background white noise! 100K is a waste. I would have used 20k trimpots here. Biased the drains as per ROG specs. <br /><br />100KA for the master vol is also a waste, IMO - 25K B or 50K A works better - with a 100K A you get a drastic amount of volume in the first 10% of rotation. 1M B for gain is just right, also. With the 220pf treble bleed cap it's bright enough for me, so, I'm keeping it (use a socket and try with/without the cap and different values). The tones are very comparable to the Plexi Drive now - The Eighteen being slightly bassy-er and more midrange-y that the Plexi in the "non-bass boost" mode and the later being chimey-er or just ever so slightly scooped. <br />Iagohttps://www.blogger.com/profile/13478141026000247956noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-83673255519038328942014-07-12T05:11:40.662+01:002014-07-12T05:11:40.662+01:00Built this one late in May right after building th...Built this one late in May right after building the Plexi Drive. I like them both a lot but decided to give the Eighteen its own enclosure first. Tuned all drains to 4.5V since the effect is just too clean with Q2 @7V. More recently, I dropped the drain voltage of Q1 and Q2 a bit, for a little more distortion/sag. The first half of the gain pot's sweep is really clean though - I'm seriously thinking about using a 1M pot for it. Great circuit.Iagohttps://www.blogger.com/profile/13478141026000247956noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-24391082092667236592014-03-28T03:35:06.796+00:002014-03-28T03:35:06.796+00:00This comment has been removed by the author.Iagohttps://www.blogger.com/profile/13478141026000247956noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-60147743225407037462013-02-16T23:58:21.750+00:002013-02-16T23:58:21.750+00:00Built this one. Also getting weird noise, but I di...Built this one. Also getting weird noise, but I didn't do the resistor thing above. Pedal sounds amazing though, thanks for the layout :)Tristanhttps://www.blogger.com/profile/06776505090117552556noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-35217965047863267792013-02-16T09:10:31.913+00:002013-02-16T09:10:31.913+00:00Love this. Putting in a request for the Runoffgroo...Love this. Putting in a request for the Runoffgroove Condor sim to match it<br /><br />Thanks IvMarkchumbox https://www.blogger.com/profile/08378022143034035602noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-32531708268618698582013-01-20T23:32:54.741+00:002013-01-20T23:32:54.741+00:00Fixed the noise and am Very Happy. Unusual proble...Fixed the noise and am Very Happy. Unusual problem. Because I was short of 1meg and 8.2k resistors I joined 2 resistors in series to make up the required value. I noticed at the 1meg and one of the 8.2k resistors the ones I made up were sitting high off the vero board in a upside down V shape with the join high off the vero board. Just speculating but I believe a magnetic/electric field might have been formed here interfering with the other components on the vero Board and the Valve Amps were picking this hiss/hum/noise. Anyway fixed now and I am pleased. PS. I wont be joining Resistors like this in future builds.Anonymoushttps://www.blogger.com/profile/09108068585463420887noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-6696188274259741952013-01-20T09:38:20.311+00:002013-01-20T09:38:20.311+00:00Got a question about this pedal. The master pot/ci...Got a question about this pedal. The master pot/circuit is really noisy when my pedal is used on Valve Amps. I tested on a Marshall & Fender valve amp. This noise does not occur on solid state amps. Is there a solution of how to remove this noise without changing the tone of the pedal. It sounds good on a Fender Tweed Deluxe 5E3 except for that Master pot /circuit noise/hum????Anonymoushttps://www.blogger.com/profile/09108068585463420887noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-37838002577764527362012-12-14T05:38:23.925+00:002012-12-14T05:38:23.925+00:00Thanks for verifying!
+mThanks for verifying!<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-1722405530288750682012-12-14T01:25:19.928+00:002012-12-14T01:25:19.928+00:00Built this and it is working fine. Bias as per rec...Built this and it is working fine. Bias as per recommendations. I am interested in this pedal because one of my Amps is a 18Watt TMB from Ceriatone. I am now looking foreward to trying out all possible modifications to see what tones are possible. Thanks very much for putting this up.Anonymoushttps://www.blogger.com/profile/09108068585463420887noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-70761625643436539612012-12-14T00:13:56.842+00:002012-12-14T00:13:56.842+00:00Bias Q1 and Q3 drains at 4.5v. Bias Q2 drain to 7v...Bias Q1 and Q3 drains at 4.5v. Bias Q2 drain to 7vzosotonehttps://www.blogger.com/profile/11721060493176731493noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-64023994046523260082012-12-13T21:24:57.373+00:002012-12-13T21:24:57.373+00:00+1
gonna build this this weekend...
heiko+1<br /> gonna build this this weekend...<br /><br />heikohakohttps://www.blogger.com/profile/04254243629068813198noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-2922922775228178292012-12-13T20:18:15.101+00:002012-12-13T20:18:15.101+00:00Wouldn't bet my late grandmother on it, but i ...Wouldn't bet my late grandmother on it, but i historically haven't build any ROG circuit that was bad... :)<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-89645522714420453492012-12-13T18:56:19.414+00:002012-12-13T18:56:19.414+00:00I have a soft spot for ROG designs. Can anyone tes...I have a soft spot for ROG designs. Can anyone testify how this one stands next to the Thor, Umble, Azabache or other amp emulation designs by ROG?Doron Barnesshttps://www.blogger.com/profile/11002512823760367163noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-3951936765726937282012-12-13T10:51:21.018+00:002012-12-13T10:51:21.018+00:00Got to build this one ....Sold my Watkins Clubman ...Got to build this one ....Sold my Watkins Clubman recently & miss it. It was the 6 watt version of the Dominator Wild Turkeyhttps://www.blogger.com/profile/07734349794566425871noreply@blogger.com