tag:blogger.com,1999:blog-8126694935311992807.post1395155166301268642..comments2024-03-28T10:17:09.019+00:00Comments on La Révolution Deux: Blackstar ISF Control - What's going on there?Anonymoushttp://www.blogger.com/profile/05172133688955122237noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-8126694935311992807.post-19385936048346163722020-10-03T07:28:20.739+01:002020-10-03T07:28:20.739+01:00http://schems.com/bmampscom/blackstar/blackstar_ht...http://schems.com/bmampscom/blackstar/blackstar_ht5-schematic.pdfVivek MEHTAhttps://www.blogger.com/profile/07254669684601617746noreply@blogger.comtag:blogger.com,1999:blog-8126694935311992807.post-43203031471086525032020-09-25T09:59:30.196+01:002020-09-25T09:59:30.196+01:00Keep up continue sharing such well post guy . Than...Keep up continue sharing such well post guy . Thank you so much. <br /><a href="https://clippingpathking.com/image-masking-services/" rel="nofollow">Image Masking Service</a> | <a href="https://removewhitebackground.com/remove-white-background/" rel="nofollow">Cut Out Photo </a> | <a href="https://productphotoediting.com/product-photo-editing/" rel="nofollow">Photo Cut Out</a><br />Md Enamul Hoqhttps://www.blogger.com/profile/02744958366701232939noreply@blogger.comtag:blogger.com,1999:blog-8126694935311992807.post-18968864876440282292019-11-27T15:03:47.395+00:002019-11-27T15:03:47.395+00:00https://www.partsisparts.net/category/catalog/blac...https://www.partsisparts.net/category/catalog/blackstar-amp-pots<br />jameshttps://www.blogger.com/profile/11903944396237130474noreply@blogger.comtag:blogger.com,1999:blog-8126694935311992807.post-22840027661407798712019-03-18T19:12:24.889+00:002019-03-18T19:12:24.889+00:00What about VR2 (Middle) value?What about VR2 (Middle) value?Rob Schneiderhttps://www.blogger.com/profile/06488402055113091360noreply@blogger.comtag:blogger.com,1999:blog-8126694935311992807.post-65417184632612364862019-01-11T03:20:51.246+00:002019-01-11T03:20:51.246+00:00Found another, higher res schematic online, the va...Found another, higher res schematic online, the values are as follows:<br /><br />R1=6k8<br />R2=4k7<br />R3=22k<br />R4=1k<br />C1=470n<br />C2=220n<br />C3=220n<br />C4=4n7<br />RV1a=10k Log<br />RV1b=10k Log<br />*RV3=100k A-Log<br />RV4=47k Lin<br /><br />*Pretty sure this is the value.<br /><br />Modeled it in LTSpice and indeed the mid scoop Q is shifted from 380Hz to about 740Hz. However, I analysed the clip at the end of the YouTube video with Audacity's Frequency Spectrum and the range sounds more like 400Hz-1.9kHz.<br /><br />Although a very useful control, the circuit is overly complicated and the name bombastic, it's nothing but a parametric EQ. <br /><br />There's another much simpler way to introduce a similar control, and in a Marshall-style tonestack no less!!<br /><br />It is mentioned in the tonestack section of a valve design book I have.<br /><br />The mod is incredibly simple, just play around with the values of one component at a time in a regular Marshall tonestack to see what happens to the frequency curve and it becomes obvious ;) dracul91https://www.blogger.com/profile/05558738528840277354noreply@blogger.comtag:blogger.com,1999:blog-8126694935311992807.post-3201770181698995072018-10-01T13:44:43.674+01:002018-10-01T13:44:43.674+01:00This article is worthy of attention. This article is worthy of attention. Hollyhttp://www.newbrightoncricketclub.co.uk/meet-holly-girl.htmlnoreply@blogger.comtag:blogger.com,1999:blog-8126694935311992807.post-89283912511854069762018-01-11T19:13:10.130+00:002018-01-11T19:13:10.130+00:00LT spice is Your friend, experimenting this topic!...LT spice is Your friend, experimenting this topic!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8126694935311992807.post-56940398901950048852012-10-18T11:22:06.664+01:002012-10-18T11:22:06.664+01:00Thanks for this!
I've been wondering how this...Thanks for this!<br /><br />I've been wondering how this works.<br />The HT series are hybrids in my book. Too much semiconductors in it.<br /><br />How do these achieve gain? Cascading tubes with IC's?<br /><br />SyrusAnonymousnoreply@blogger.com