Marshall JCM800 2205

Max Landegren from Billion Dollar Babies came by with his other JCM800 and wanted me to rebuild the distortion channel in it. I’ve modded his other JCM800 before and he asked me to make this amp more suited for soloing with a fatter sound with more compression and gain.

IMG_8486IMG_8447Stock JCM800 2205, not my favorite Marshall but soon it will be sounding like I want it to do.

IMG_8475 I made this small turret board for the distortion channel.

IMG_8481The new turret board for the distortion channel is in place and some changes are made to the power amp and power supply.

IMG_8488The faceplate in the upper right corner that makes all the difference 🙂


Here’s Max trying out the amp for the first time after the modification:

Selmer PA 100 No. 3

My third Selmer PA 100 rebuild!

Here it is in original shape:143

As I always do with these major PA rebuilds, I clean them completely from the old parts:56

Clean it from the old dirt:87

Point to point boards:9

Wiring around the power tube sockets:10

Cables for the boards:12

And components for the boards:13 14

And get the boards into the amp and try to remember where all cables where supposed to go:15 16

And here we have the finished result:1

1134 62597810

It’s a three channel amp with a tube buffered effects loop, dual switchable master volumes and a solo boost.

Control for each channel: gain, volume, treble, middle, bass. Channel two and three also has a tightness control. Channel two has a three way mid boost switch (low mid/normal/high mid) and channel three has a switchable solo boost that gives a push in the low end, a push in the mids at 600hz and flat out the highs.

Controls for the power amp: Dual master volumes, presence, punch and a three way range switch for the punch.

Here’s a clip of the amp:


Bonus clip of channel 2 and 3 before the amp was finished:

Sovtek MIG-50

I did a mod to this Sovtek MIG-50, changed the preamp circuit and made some minor changes to the power amp and the power supply.
Now it has a gain control and a master volume as well that works for both inputs. Input I: three gain stages. Input II: two gain stages.

IMG_7650 IMG_7651 IMG_7672 IMG_7673

Here it is at full gain using input I.


Another Selmer PA 100!

Time for another Selmer PA 100! This amp was as most old British PA’s from the 60s and 70s an all tube amp with excellent transformers. Therefor they are a great platform for guitar projects and a bonus is that there’s room for a lot of controls on the big front panels. It has now become a two channel guitar amp with dual footswitchable master volumes and a tube buffered effects loop.

Here it is in original shape:13487828_1211553312222021_366885353_n13487707_1212763048767714_34312673_n13521803_1212763398767679_1500853209_n13521631_1212763462101006_2105691400_n

Taking out the old point to point board to make room for new ones. 13492859_1212905925420093_129115339_n

These amps are more than often filled with 40 year old dust and dirt.13514339_1214488181928534_102069746_n

So I prefer to clean them before working in them 🙂13493053_1212907305419955_1050315758_n 13510445_1212907625419923_882744814_n 13515163_1214488718595147_255453481_n 13530257_1214488781928474_331365642_n

New turret boards made for this amp:dsc_0662-kopia

And here they are populated with components and cables:14409209_1289953117715373_3153470_n

Installing the boards inside the amp:14518812_1297949446915740_1355651757_n

And here’s the finished result:9 1 2 3 4 5 6 7 8

It’s now a totally rebuilt amp with a new preamp, new power amp and new power supply section. It has two independent channels with gain, tightness, bass, middle, treble and volume. The mastersection has presence, punch and two switchable master volumes as well as a tube buffered loop.

Here’s a clip of it:

Sound City 120R PA

My latest project is this Sound City PA 120R which had a solid state preamp and a tube power amp section. It was a good platform with it’s big transfromers and room for a lot of controls and functions on the big front panel. It has now become a four channel amp, all tube of course with a footswitchable gain boost (extra tube stage) for each channel and dual footswitchable master volumes. So it has eight footswitchable sounds which can all get a volume boost for solos. Other features are tube buffered effects loop and bias potentiometers and test point jacks for each of the six EL34’s on the back panel.

Here it is in original shape:DSC_0603DSC_0604DSC_0605DSC_0607DSC_0608

Here you can see the guts of the amp before I did my work in it:DSC_0609DSC_0610

I took out all parts except for the good old transformers and the tube sockets + impedance and voltage switches:DSC_0611DSC_0612

Making turret boards:DSC_0605 (2)DSC_0614

All cables attached to the turret boards:IMG_5981

Turret boards populated with components which makes it a totally different amp:DSC_0554DSC_0553DSC_0552DSC_0555

Preparing the amp to receive the turret boards:DSC_0553 (3)

And attaching all the cables where they are supose to be:IMG_6027IMG_6095

And here we have the finished result:DSC_0663aDSC_0698aDSC_0696aDSC_0659DSC_0694aDSC_0708DSC_0722DSC_0731aDSC_0733aDSC_0783DSC_0757aDSC_0769aControls for each of the four channels: gain, three way mid boost switch, bass, middle, treble and volume + a footswitchable gain boost.

Controls for the power amp: dual footswitchable master volumes, presence and punch both with a three way range switch to match the amp to different cabinets.


Simms-watts PA 100

It’s time for another Simms!

242 (1)I really like the big transformers in these amps.

6Here’s the guts from the original PA circuit.

4 (1)

6 (1)Out with the old and in with the new.

DSC_0485Making new turret boards.

DSC_0502bTurret boards filled with NOS Mustard Capacitors and Iskra resistors along with some new components.

2dfInstalling the new circuits in the amp.


Here’s the finished result:DSC_0535aDSC_0538aDSC_0561aDSC_0548aDSC_0580aDSC_0575aDSC_0594aDSC_0588a


dfdfd - Kopia

It has two channels with gain, volume, treble, middle, bass and a three way gain structure switch. Channel 2 also has a tightness control and a growl control. The controls for the power amp is master volume, presence, punch and deep.



Re-amping with In Mourning

Some pics and a clip from the re-amping session I did with In Mourning. I’m honored that they want to use my amps for their new album.12471443_1675908572649155_6987028480564561240_o


The amp is a totally rebuilt Laney PA 100 with four channels, the cab is a Malmberg with Celestion Greenbacks. Mics in front of the cab is a Golden Age R1 MK3 Active and a Shure SM57.

Check them out:

Selmer PA 100

My latest project is this Selmer PA 100! It will be a three channel amp with a footswitchable gain boost that kicks in an extra gain stage on each channel. It will have a tube buffered loop and a lot of voicing options and as always it will be built point to point using NOS mustard caps and Iskra resistors 🙂IMG_5407IMG_5408 IMG_5410 IMG_5412


IMG_5448 IMG_5466 Giving a new finish to the front panel.IMG_5478 Cleaning it from the old board and make room for new ones.

IMG_5471Renovating the old switches.

IMG_5467 IMG_5479 New turret boards are done.

IMG_5523Installing new potentiometers and switches.

IMG_5548 IMG_5549 The boards are ready to be installed!IMG_5616 IMG_5610Just need to remember where all the houndred cables are suposed to go 🙂


Here is the finished result:DSC_0527bDSC_0399aDSC_0452bDSC_0409aDSC_0449aDSC_0413bDSC_0514aDSC_0393c DSC_0518aDSC_0522a



Here are some clips:

First test of the amp using my Hagström Swede.

Showing some metal sounds. Guitar straight into the amp, nothing in the loop.

Overall demo of the amp using my Greco EGF-1000. I’m running a TC G-major 2 in the loop for some delays. The cab is a Malmberg 4×12 with Celestion Greenbacks




Marshall JCM 800 1959

IMG_5576I’ve installed a tube buffered loop and modified this Marshall JCM 800 1959. It’s a smaller mod since the main PCB is still there and the power amp is almost untouched, but the change in tone, gain, dynamic response and feeling is huge!

IMG_5556Before mod. You can see that someone has installed a master volume, and it has been modded with an extra preamp tube at some point before but is restored to stock.

IMG_5575After mod. Effects loop installed and the preamp is changed pretty much along with some minor changes in the power amp and the power supply. I’m using shielded cable for the signal to avoid hiss and noise.IMG_5574

I’m playing a Greco EGF 1000 with Seymour duncan JB + 59 straight into the amp and running a G major II in the loop for some delays. The cab is a Malmberg 4×12 with old Celestion Greenbacks.


Bonus clip when Max tries out the amp.