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.

dfdfd

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

s

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:
http://www.inmourning.net/
https://www.facebook.com/inmourningband

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.

Peavey VTM120

I got this Peavey VTM 120 on my bench. It failed during a concert and started to smoke. I opened it up and found burnt plastic thatwas caused by a shorting electrolytic cap. I changed the burnt resistor, the power tubes and all the electrolytic caps in the power supply and now it’s up and running again!

IMG_5424IMG_5388IMG_5389IMG_5390 IMG_5421

Ribbon mic shootout

Me and a good friend of mine were both looking for a good ribbon mic for guitar, so we decided to do a ribbon mic shootout. We lent a couple of mics and got started.

We recorded a backround track with drums and bass first. Then I recorded a guitar track that we re-amped through my amp and mic’d it with different ribbon mics at the exact same spot, about 15 cm (6″) from the grill cloth on my Malmberg cab. You can listen to the guitar track for each mic or in a mix with drums and bass.

DSC_1323I played through this amp which is my modded Laney PA 100, running a TC G-major in the loop and through my Malmberg cab with old Celestion Greenbacks.

DSC_1327Used this Greco EGF-1000 with Seymour Duncan JB and 59.

DSC_1328Here is the monster bass amplifier!

DSC_1330Recording drums and bass.

 

Arty-1 by Arthur FisherDSC_1338

Beyer M160DSC_1340

Coles 4038DSC_1345

Golden Age R1 MkIIDSC_1334

Golden Age R1 MkIII ActiveDSC_1335

Golden Age R1 Tube ActiveDSC_1336

Golden Age R2DSC_1333

Sontronics DeltaDSC_1337

Sontronics SigmaDSC_1339

Reference mic: Shure sm57DSC_1341

A big thanks to:

Erik Nerback who helpt with the recording and mix.

Johan Nordin who lent us Coles 4038 and Beyer M160.

Stefan Krooks at Stomp studios who lent us the Sontronics mics.

Golden Age Music who lent us all the Golden Age mics.

Gammalthea who lent us Arty-1.