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18Watt Technical Discussion

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Donations to 18watt.com

Last post by Graydon « Tue 07/23/24 5:50 pm
Posted in By the Bench

by Graydon » Tue 07/23/24 5:50 pm » in By the Bench

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11571 Views

Last post by Graydon
Tue 07/23/24 5:50 pm
Voltage Dropping Zener Diodes

Last post by JMPGuitars « Tue 10/06/20 8:16 am

by JMPGuitars » Tue 10/06/20 8:16 am

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21092 Views

Last post by JMPGuitars
Tue 10/06/20 8:16 am
Soldering Technique

Last post by JMPGuitars « Fri 07/26/19 9:03 am
Replies: 2
by JMPGuitars » Sun 06/09/19 7:29 am

2 Replies

22588 Views

Last post by JMPGuitars
Fri 07/26/19 9:03 am
Modern Ground Schemes

Last post by JMPGuitars « Fri 04/10/20 6:20 pm
Replies: 4
by JMPGuitars » Tue 05/07/19 7:48 pm

4 Replies

26426 Views

Last post by JMPGuitars
Fri 04/10/20 6:20 pm
This room is for 18W-related posts only!

Last post by Graydon « Fri 04/14/06 10:09 am

by Graydon » Fri 04/14/06 10:09 am

0 Replies

22038 Views

Last post by Graydon
Fri 04/14/06 10:09 am
What Every Newcomer Should Know...

Last post by dustin_writes « Wed 08/23/06 1:42 pm
Replies: 54
by Gabi » Fri 11/18/05 12:10 pm
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99899 Views

Last post by dustin_writes
Wed 08/23/06 1:42 pm

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Tremolo TMB Questions

Last post by JMPGuitars « Wed 03/26/25 8:48 pm
Replies: 105
by JMPGuitars » Wed 05/05/21 6:24 pm
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105 Replies

42657 Views

Last post by JMPGuitars
Wed 03/26/25 8:48 pm
Pentode (EF86) pre-amps and combo's?

Last post by JMPGuitars « Sat 05/11/24 9:31 am
Replies: 74
by mark0614 » Fri 11/02/07 9:18 pm
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61051 Views

Last post by JMPGuitars
Sat 05/11/24 9:31 am
18 watt fizz: please help me diagnose this?

Last post by HarryPotter69 « Sun 02/25/24 11:54 am
Replies: 171
by TomOlsen1 » Thu 01/14/10 4:09 am
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204584 Views

Last post by HarryPotter69
Sun 02/25/24 11:54 am
Help improve pp-18 tone

Last post by Isaac Stuckey « Sun 01/19/14 11:32 pm
Replies: 110
by asd » Mon 08/22/11 9:53 pm
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89163 Views

Last post by Isaac Stuckey
Sun 01/19/14 11:32 pm
Cheap donor amp for 18watt build

Last post by ejendres « Tue 03/25/25 9:52 pm

by ejendres » Tue 03/25/25 9:52 pm

0 Replies

62 Views

Last post by ejendres
Tue 03/25/25 9:52 pm
18W SuperLite TMB a little too harsh

Last post by Bieworm « Mon 03/17/25 11:50 am
Replies: 2
by Piamp » Sat 03/15/25 12:21 pm

2 Replies

2552 Views

Last post by Bieworm
Mon 03/17/25 11:50 am
Superlite TMB blown fuse during voltage reading.

Last post by Piamp « Sun 03/16/25 7:33 am
Replies: 1
by MartinL » Sat 03/15/25 6:41 pm

1 Replies

1346 Views

Last post by Piamp
Sun 03/16/25 7:33 am
Cascade mod

Last post by Mahesh « Wed 03/12/25 2:14 pm
Replies: 3
by Mahesh » Wed 03/05/25 9:44 am

3 Replies

1596 Views

Last post by Mahesh
Wed 03/12/25 2:14 pm
Hoffman 6v6 Plexi kit. Opinions?

Last post by Bieworm « Wed 03/05/25 4:45 pm
Replies: 2
by 3jaw » Sun 03/02/25 4:51 pm

2 Replies

1146 Views

Last post by Bieworm
Wed 03/05/25 4:45 pm
Need Help with Squealing

Last post by valboschi « Thu 02/27/25 10:43 am
Replies: 6
by valboschi » Mon 02/24/25 5:07 pm

6 Replies

1222 Views

Last post by valboschi
Thu 02/27/25 10:43 am
Treble Bass, fixed mid 18w

Last post by Piamp « Sun 02/23/25 9:55 am
Replies: 6
by Piamp » Fri 02/21/25 11:01 am

6 Replies

1239 Views

Last post by Piamp
Sun 02/23/25 9:55 am
Just finish my 18tmb, hum and squeel

Last post by Hstpdl74 « Sat 02/22/25 11:16 pm
Replies: 22
by Hstpdl74 » Tue 02/18/25 11:32 pm
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2562 Views

Last post by Hstpdl74
Sat 02/22/25 11:16 pm
18 watt tremolo mods

Last post by Jonweldon21 « Sat 02/22/25 5:17 pm
Replies: 9
by Jonweldon21 » Fri 02/21/25 9:04 pm

9 Replies

1332 Views

Last post by Jonweldon21
Sat 02/22/25 5:17 pm
2-Channel WEMarshall 18w

Last post by Bob88 « Thu 02/13/25 2:24 pm
Replies: 2
by Bob88 » Sat 12/28/24 6:31 am

2 Replies

1382 Views

Last post by Bob88
Thu 02/13/25 2:24 pm
18w Marshall Lite

Last post by JMPGuitars « Thu 02/06/25 1:57 pm
Replies: 9
by scstill » Sun 02/02/25 10:34 am

9 Replies

2305 Views

Last post by JMPGuitars
Thu 02/06/25 1:57 pm
Can anyone ID this circuit?

Last post by JMPGuitars « Thu 01/30/25 12:15 pm
Replies: 1
by Phrak9 » Thu 01/30/25 11:06 am

1 Replies

1035 Views

Last post by JMPGuitars
Thu 01/30/25 12:15 pm
Looking for DIY chassis for builds.

Last post by JMPGuitars « Wed 01/29/25 10:06 pm
Replies: 7
by Dragonfly18 » Sun 01/26/25 1:02 pm

7 Replies

1493 Views

Last post by JMPGuitars
Wed 01/29/25 10:06 pm
characteristics PT

Last post by Juanjo42 « Wed 01/29/25 4:17 pm
Replies: 4
by Juanjo42 » Mon 01/20/25 6:21 pm

4 Replies

1316 Views

Last post by Juanjo42
Wed 01/29/25 4:17 pm
I'm losing my mind

Last post by Daviedawg « Sun 01/19/25 4:02 am
Replies: 6
by kerchakone » Thu 11/21/24 11:18 am

6 Replies

1764 Views

Last post by Daviedawg
Sun 01/19/25 4:02 am
Separate filter caps for PI and preamp?

Last post by Bieworm « Wed 01/15/25 12:45 pm
Replies: 4
by Cartman » Sat 01/11/25 9:57 pm

4 Replies

1310 Views

Last post by Bieworm
Wed 01/15/25 12:45 pm
Superlite TMB chassis layout - will this fly?

Last post by Bieworm « Fri 12/06/24 4:43 am
Replies: 71
by gkwallace » Wed 10/30/24 2:38 pm
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9692 Views

Last post by Bieworm
Fri 12/06/24 4:43 am
Superlite done - Need help tone shaping

Last post by JMPGuitars « Sat 11/30/24 9:40 pm
Replies: 9
by gkwallace » Fri 11/29/24 5:43 pm

9 Replies

1642 Views

Last post by JMPGuitars
Sat 11/30/24 9:40 pm
Distortion on Positive Cycle of Sine Wave

Last post by TriodeLuvr « Thu 11/21/24 6:43 am
Replies: 2
by Big Swifty » Wed 11/13/24 11:28 am

2 Replies

1548 Views

Last post by TriodeLuvr
Thu 11/21/24 6:43 am
18 Watt TMB Modern Classic Build

Last post by JMPGuitars « Sun 11/17/24 3:30 pm
Replies: 3
by Big Swifty » Sat 11/16/24 4:47 pm

3 Replies

1797 Views

Last post by JMPGuitars
Sun 11/17/24 3:30 pm
Ideal PT for SS-rectified 18w?

Last post by yello « Wed 11/06/24 3:08 pm
Replies: 3
by yello » Thu 10/17/24 3:42 pm

3 Replies

1790 Views

Last post by yello
Wed 11/06/24 3:08 pm
JTM45 to 18watt head cab conundrum

Last post by TriodeLuvr « Sun 11/03/24 10:51 pm
Replies: 13
by gkwallace » Wed 10/23/24 12:20 pm

13 Replies

2409 Views

Last post by TriodeLuvr
Sun 11/03/24 10:51 pm
1974x Dagnall Transformers compatibility with Mojotone Small Parts Kit

Last post by colossal « Sun 10/27/24 1:47 pm
Replies: 2
by izymandias » Thu 10/24/24 1:12 pm

2 Replies

1511 Views

Last post by colossal
Sun 10/27/24 1:47 pm
Tube rectifier current limiting resistors?

Last post by Bieworm « Sat 10/26/24 5:46 am
Replies: 6
by fyzygy » Thu 10/24/24 7:15 pm

6 Replies

1947 Views

Last post by Bieworm
Sat 10/26/24 5:46 am
PI hum

Last post by bradfinamore « Fri 10/25/24 9:10 am
Replies: 6
by NSky » Thu 09/05/24 7:00 pm

6 Replies

1901 Views

Last post by bradfinamore
Fri 10/25/24 9:10 am
18 watt original merged with 18 modern classic

Last post by JMPGuitars « Wed 10/23/24 3:45 pm
Replies: 4
by petedub » Tue 10/22/24 9:12 am

4 Replies

1828 Views

Last post by JMPGuitars
Wed 10/23/24 3:45 pm
6SJ7 Pentode 18 watt Lite...Formerly the ABSOLUTE Minimum

Last post by LeifH « Fri 10/18/24 2:28 pm
Replies: 462
by StarGeezers » Sat 08/23/08 5:54 pm
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108195 Views

Last post by LeifH
Fri 10/18/24 2:28 pm
Just finished..

Last post by divali « Fri 10/04/24 5:35 am
Replies: 7
by divali » Tue 06/16/20 4:04 am

7 Replies

3798 Views

Last post by divali
Fri 10/04/24 5:35 am
Mojotone build - intensity as volume

Last post by Hippie Joe « Fri 09/27/24 6:03 pm
Replies: 2
by Hippie Joe » Fri 08/23/24 2:54 pm

2 Replies

1978 Views

Last post by Hippie Joe
Fri 09/27/24 6:03 pm
Clone 1974x to SLP ( RR ) plexi

Last post by Bieworm « Wed 09/25/24 1:52 pm
Replies: 9
by Plig88 » Sun 09/15/24 11:39 am

9 Replies

2219 Views

Last post by Bieworm
Wed 09/25/24 1:52 pm
resistor legs not long enough to fit turret board

Last post by JMPGuitars « Sun 09/22/24 1:39 pm
Replies: 5
by petedub » Sat 09/21/24 7:13 pm

5 Replies

2043 Views

Last post by JMPGuitars
Sun 09/22/24 1:39 pm
Problem with Tremolo 18w

Last post by JMPGuitars « Tue 09/17/24 8:44 am
Replies: 2
by mitchfloyd » Tue 09/17/24 5:44 am

2 Replies

1666 Views

Last post by JMPGuitars
Tue 09/17/24 8:44 am
Newby Mojotone 18 Watt Build

Last post by Daviedawg « Sun 09/15/24 2:31 am
Replies: 9
by TXFlatSix » Fri 09/13/24 9:33 am

9 Replies

2194 Views

Last post by Daviedawg
Sun 09/15/24 2:31 am
General Questions on a recent build.

Last post by jlzuzze « Sat 09/14/24 4:30 pm

by jlzuzze » Sat 09/14/24 4:30 pm

0 Replies

1841 Views

Last post by jlzuzze
Sat 09/14/24 4:30 pm
18watt tmb circutry speaker

Last post by Bieworm « Thu 09/12/24 2:53 am
Replies: 1
by Allendaniels » Wed 09/11/24 9:35 pm

1 Replies

1526 Views

Last post by Bieworm
Thu 09/12/24 2:53 am
Modulus Amps Marshbar

Last post by SpeedTrip « Thu 09/05/24 8:42 am
Replies: 24
by SpeedTrip » Sat 05/25/24 11:36 am
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24 Replies

6320 Views

Last post by SpeedTrip
Thu 09/05/24 8:42 am
Tmb circuitry

Last post by Bieworm « Wed 09/04/24 11:26 am
Replies: 1
by Allendaniels » Tue 09/03/24 5:34 pm

1 Replies

1431 Views

Last post by Bieworm
Wed 09/04/24 11:26 am
How to reduce mid range?

Last post by Bieworm « Wed 09/04/24 11:23 am
Replies: 1
by NSky » Tue 09/03/24 3:29 pm

1 Replies

1585 Views

Last post by Bieworm
Wed 09/04/24 11:23 am
High pitch oscillation on trem channel

Last post by JMPGuitars « Thu 08/15/24 8:39 am
Replies: 9
by kaheksa toista » Mon 08/12/24 8:02 am

9 Replies

2570 Views

Last post by JMPGuitars
Thu 08/15/24 8:39 am
18W EF86 XXL Recording Amp

Last post by JMPGuitars « Wed 08/14/24 9:43 am
Replies: 7
by JMPGuitars » Tue 08/06/24 7:13 pm

7 Replies

2511 Views

Last post by JMPGuitars
Wed 08/14/24 9:43 am
Question about JMPGuitars’ “Modern Grounding Schemes”

Last post by JMPGuitars « Sun 08/11/24 6:02 pm
Replies: 1
by jimoreilly » Sun 08/11/24 4:23 pm

1 Replies

1734 Views

Last post by JMPGuitars
Sun 08/11/24 6:02 pm
18 Watt TMB Superlite output sags into silence

Last post by ian@belsonique.com « Sun 07/28/24 4:53 pm
Replies: 17
by ian@belsonique.com » Mon 07/15/24 12:18 am

17 Replies

3550 Views

Last post by ian@belsonique.com
Sun 07/28/24 4:53 pm
AC heaters done right….how to get it done

Last post by TriodeLuvr « Sun 07/28/24 2:43 pm
Replies: 17
by Doxie man » Sat 08/28/21 9:01 pm

17 Replies

10380 Views

Last post by TriodeLuvr
Sun 07/28/24 2:43 pm
PP design ideas @ 100mA HT current

Last post by JMPGuitars « Wed 07/24/24 10:27 am
Replies: 2
by fyzygy » Wed 07/24/24 12:24 am

2 Replies

1884 Views

Last post by JMPGuitars
Wed 07/24/24 10:27 am
New build but no output

Last post by Daviedawg « Sat 07/20/24 2:15 am
Replies: 17
by armandodiaz » Sat 07/13/24 11:32 pm

17 Replies

2987 Views

Last post by Daviedawg
Sat 07/20/24 2:15 am
Bias question for push pull El84

Last post by Davidscott « Mon 07/15/24 6:47 pm
Replies: 2
by Davidscott » Mon 07/15/24 2:36 pm

2 Replies

1950 Views

Last post by Davidscott
Mon 07/15/24 6:47 pm

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