tag:blogger.com,1999:blog-3663328242060593104.post5540857468259090788..comments2023-05-15T22:55:33.521-07:00Comments on Jefs Tube Amp Blog: 1/10/15 Kalamazoo Reverb 12ghostwriterhttp://www.blogger.com/profile/07522322789985067215noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-3663328242060593104.post-46685353688781346892017-08-15T20:05:49.470-07:002017-08-15T20:05:49.470-07:00Missed this one! I'll draw one up and post it....Missed this one! I'll draw one up and post it. For now I can tell you how it's done. Find which side of the filament is grounded. Lift that side. Take 2x100 ohm resistors (1/2 watt or better) and install one end on each to each side of the heaters (pins 4 and 5). The other ends should be twisted together. Solder those to the cathode bias capacitor and you're done. You can also sub a 100 ohm potentiometer for the 2 resistors to make a 'hum balance" pot. You can copy the cathode biased Ampeg B15 schematic for reference. ghostwriterhttps://www.blogger.com/profile/07522322789985067215noreply@blogger.comtag:blogger.com,1999:blog-3663328242060593104.post-31437049269120991902016-10-26T23:55:43.032-07:002016-10-26T23:55:43.032-07:00Here is one:
http://www.tubeampdoctor.com/product_...Here is one:<br />http://www.tubeampdoctor.com/product_info.php?products_id=3874&url_node_name=Reverb_Cans_Effects_Accutronics_Reverb&language=enghostwriterhttps://www.blogger.com/profile/07522322789985067215noreply@blogger.comtag:blogger.com,1999:blog-3663328242060593104.post-59026576221305071272016-10-26T23:52:19.162-07:002016-10-26T23:52:19.162-07:00Hi! Great question. It's been a long time sinc...Hi! Great question. It's been a long time since I've had to replace a Gibson Reverb tank so I may be incorrect with this:<br /><br />4FB2A1C<br /><br />Trouble is, I don't know where to get one! A 4AB3C1B like you see in a Fender won't work but in a pinch I have replaced the reverb driver transformer with a Fender one (did this when the Gibson driver transformer went bad only, tanks were plentiful back then!) then used a Fender tank.<br /><br />Thanks for your question and sorry about the delay in getting it answered! Hope this helps! JBghostwriterhttps://www.blogger.com/profile/07522322789985067215noreply@blogger.comtag:blogger.com,1999:blog-3663328242060593104.post-90860557086271843742016-10-19T14:11:05.311-07:002016-10-19T14:11:05.311-07:00Hey,
What model of reverb tank works in these thi...Hey,<br /><br />What model of reverb tank works in these things?5¢https://www.blogger.com/profile/05216934189906446307noreply@blogger.comtag:blogger.com,1999:blog-3663328242060593104.post-90765299285554503242016-02-02T20:18:13.063-08:002016-02-02T20:18:13.063-08:00Thanks for this post. Do you have a schematic for ...Thanks for this post. Do you have a schematic for the filament fix? Thanks<br />Emile Menaschehttps://www.blogger.com/profile/07244485944661222493noreply@blogger.comtag:blogger.com,1999:blog-3663328242060593104.post-83976831763802334692015-01-11T07:39:33.132-08:002015-01-11T07:39:33.132-08:00I like the way this reverb sounds better than a Fe...I like the way this reverb sounds better than a Fender. Come to think of it, If you want a more lush reverb on your Fender, might consider this: replace the 500pf 'feed' cap with a 1000 or .001. Then replace the 100k pot with a 250k and surf away. Worth of a try! You can always go back.ghostwriterhttps://www.blogger.com/profile/07522322789985067215noreply@blogger.com