What electronic parts are in my .strandberg*?

For whatever reason, there are times that you may want to know the details about components used in the wiring of your .strandberg* instrument. Maybe a part needs to be exchanged or perhaps you're contemplating a customisation. Your reason is your own, but below you'll find most of the necessary information about the electronics found in the current .strandberg* product lineup. Please note that components like these, even from the most respected of manufacturers, usually have tolerances and rarely have the precise value printed on them if measured with a multimeter. There are also cases where a different number of components have been mounted to achieve the intended tone of the respective wiring diagram. This is commonly due to shortage of parts in which case other value components has been wired in series or parallel to achieve the correct value.

Original series

Pots (all positions): CTS 500KA Solid shaft (6-string), Fishman 25KA 2-pole on-on push/pull splined Split shaft (7- and 8-string). Threaded part of shaft length/diameter: 3/8" (9,53mm). 

Switch: CRL 4-pole 5-way lever switch (6-string), CRL 3-pole 3-way switch (7- and 8-string). Switch tips are equal in size to what is used on most US made instruments.

Jack (all models): Pure Tone PTT2 stereo jack.

Additional: 680pf ceramic cap and 150K resistor in parallel (treble bleed on 6-string), 0,022uF Mylar film cap (tone on 6-string), 0,22uF Mylar film cap (tone on 7- and 8-string).

Prog series

Pots (all positions): CTS 500KA Solid shaft (6-string), Fishman 25KA 2-pole on-on push/pull splined Split shaft (7- and 8-string). Threaded part of shaft length/diameter: 3/8" (9,53mm). 

Switch: CRL 4-pole 5-way lever switch (6-string), CRL 3-pole 3-way switch (7- and 8-string). Switch tips are equal in size to what is used on most US made instruments.

Jack (all models): Pure Tone PTT2 stereo jack.

Additional: 680pf ceramic cap and 150K resistor in parallel (treble bleed on 6-string), 0,022uF Mylar film cap (tone on 6-string), 0,22uF Mylar film cap (tone on 7- and 8-string).

Fusion series

Pots (all positions): CTS 500KA Solid shaft. Threaded part of shaft length/diameter: 3/8" (9,53mm). 

Switch (all models): CRL 4-pole 5-way lever switch. Switch tips are equal in size to what is used on most US made instruments.

Jack (all models): Pure Tone PTT2 stereo jack.

Additional (all models): 680pf ceramic cap and 150K resistor in parallel (treble bleed), 0,022uF Mylar film cap (tone, newer model), 0,047uF Mylar film cap (tone, older model), 499K resistor (treble compensation in split positions), 0,047uF Mylar film cap (tone control frequency compensation for humbucker on older models).

Metal series

Pots (all positions): Fishman 25KA 2-pole on-on push/pull splined Split shaft. Threaded part of shaft length/diameter: 3/8" (9,53mm). 

Switch (all models): CRL 3-pole 3-way lever switch. Switch tips are equal in size to what is used on most US made instruments.

Jack (all models): Pure Tone PTT2 stereo jack.

Additional (all models): 0,22uF Mylar film cap (tone).

Classic series

Pots (all positions): CTS 500KA splined Split shaft (Boden), CTS 250KA Solid shaft (Sälen). Threaded part of shaft length/diameter: 3/8" (9,53mm).

Switch: CRL 4-pole 5-way lever switch (6-string Boden), CRL 3-pole 5-way lever switch (7- and 8-string), CRL 3-pole 3-way lever switch (Sälen). Switch tips are equal in size to what is used on most US made instruments.

Jack (all models): Pure Tone PTT2 stereo jack.

Additional: 680pf ceramic cap and 150K resistor in parallel (treble bleed), 0,047uF Mylar film cap (tone on 6-string), 0,022uF Mylar film cap (tone on 7-, 8-string and Sälen), 499K resistor (volume resistance compensation for single coils on 6-string Boden), 0,047uF Mylar film cap (tone control frequency compensation for humbucker on 6-string Boden).

Deluxe series

Pots (all positions): CTS 250KA Solid shaft. Threaded part of shaft length/diameter: 3/8" (9,53mm). 

Switch (all models): CRL 3-pole 3-way lever switch. Switch tips are equal in size to what is used on most US made instruments.

Jack (all models): Pure Tone PTT2 stereo jack.

Additional (all models): 680pf ceramic cap and 150K resistor in parallel (treble bleed), 0,022uF Mylar film cap (tone).

Standard series

Pots (all positions): CTS 500KA Solid shaft. Threaded part of shaft length/diameter: 3/8"/ 9,53mm. 

Switch: CRL 4-pole 5-way lever switch (6-string), CRL 3-pole 5-way lever switch (7- and 8-string). Switch tips are equal in size to what is used on most US made instruments.

Jack (all models): Pure Tone PTT2 stereo jack.

Additional: 680pf ceramic cap and 150K resistor in parallel (treble bleed), 0,047uF Mylar film cap (tone on 6-string with Trem), 0,022uF Mylar film cap (tone on 7-, 8-string and 6-string HH), 499K resistor (volume resistance compensation for single coils on 6-string with Trem), 0,047uF Mylar film cap (tone control frequency compensation for humbucker on 6-string with Trem).

Parts list

CTS 500KA Solid shaft pots: EP-0886-000

CTS 500KA splined Split shaft pots: EP-0086-000

CTS 250KA Solid shaft pots: EP-0885-000

Fishman 25KA 2-pole on-on push/pull Solid shaft pots: 357-000-101

CRL 4-pole 5-way lever switch: EP-0078-000

CRL 3-pole 5-way lever switch: EP-0076-000

CRL 3-pole 3-way lever switch: EP-0075-000

Pure Tone PTT2 stereo jack: PTT2

Functionality clarifications

680pf ceramic cap and 150K resistor in parallel (treble bleed): These two components are wired between the input and output of the volume pot to "bleed" treble frequencies through it and avoid muddy tone on lower settings. Loss of high frequencies does not trace back to the pot itself, but is instead a result of how a cable and preamp reacts to the added load of the pot. Hence the treble loss behaviour will be different in relation to cable properties and preamp construction. On some amps you might not need the treble bleed circuit at all and on some amps, it's almost necessary. In any case, whenever experiencing treble loss, the pot itself is rarely to blame and a change of pot will unlikely make any difference. This phenomenon is closely related to high output impedance and as such, mostly passive pickups are affected. Active pickups commonly have a notably lower output impedance which means that little to no treble loss will come from turning the volume pot down.

499K resistor (volume resistance compensation for single coils): This resistor is wired in parallel with the resistance of the volume pot whenever a single coil or split humbucker pickup position is chosen on certain models. This makes the pickup(s) see a volume control load that more closely resembles what is commonly used for single coil pickups (approximately 250k) and soften the tone from these. 

0,047uF Mylar film cap (tone control frequency compensation for humbucker on the switch): This cap is wired in parallell with the cap on the tone control to alter the cutoff-frequency between humbucker and single coil pickup positions on certain models. This means that the value of the tone control cap will effectively be 0,047uF in single coil pickup positions and 0,022uF in humbucking pickup positions.

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