L Robertson

Fine Guitar Amplifiers. Made in Canada.

[L Robertson @RobertsonAmps]

@ValveWizard Missing a resistor to ground on the input grid of the EF86?

[L Robertson @RobertsonAmps]

@MrReidTeaching Reminiscent of a young MJ #thelastdance

[L Robertson @RobertsonAmps]

Well hello new friend. I wasn't expecting you to arrive this soon... Looks like I will need to change my weekend plans 🤓
#theartofelectronics

[L Robertson @RobertsonAmps]

Thanks to @AnalogEng (of the famous @MacroFab Engineering Podcast) for bringing these new books to my attention. I can't wait to get into the weeds with LTspice 😎.
#alwaysbelearning

[L Robertson @RobertsonAmps]

@rheingoldheavy I'm assuming it has the same sourcing limitations of the HT16K33 but I've been working with an HT16D35(A) (A=SPI, B=I2C) recently. So far, I'm happy with its performance. I bought a few from the US rep but placed my second order with LCSC (Fwiw).

[L Robertson @RobertsonAmps]

A quick with/without comparison.

Signal path = guitar -> usb powered loop switcher -> overdrive pedal -> practice amp -> condenser mic -> recording interface

[L Robertson @RobertsonAmps]

Isolated, battery powered USB.

Prototyping will never be the same. 😊

[L Robertson @RobertsonAmps]

@ValveWizard I think harmonic trem was used in some brownface Fenders. They split the signal into treble and bass frequencies and applied trem to each signal separately using two LFOs 180° out-of-phase.
A cab sim would be cool. I'll have to look into the DM160 tube.

[L Robertson @RobertsonAmps]

I'm really looking forward to getting beyond the breadboarding/prototyping stage with this pedal switcher project. 🐢 🤓

#slowandsteady #prototyping #pedalswitcher @ Ottawa, Ontario https://t.co/3lOmCWLvEq

[L Robertson @RobertsonAmps]

Making new bolts look old. Gotta love chemistry. Ferric Chloride 1 - Zinc 0.

I didn't think the shiny zinc look would be appropriate on the 12" jointer. Problem solved.

#toolrestoration… https://t.co/vPVp1LuOxy

[L Robertson @RobertsonAmps]

Transformers: more than meets the eye.

Picked up a stash of Hammond transformers from Next Gen… https://t.co/xejSi3qZnb

[L Robertson @RobertsonAmps]

Nothing fancy, just a simple flush trim plane. Glue squeeze out doesn't stand a chance 💪… https://t.co/hjWVumuBE1

[L Robertson @RobertsonAmps]

Scored a lovely Starrett combination square set through my local online classified section the… https://t.co/pFrmM83ZzT

[L Robertson @RobertsonAmps]

Either the Mojo Fairy snuck into the lab last night and dropped off some tone nuggets or I… https://t.co/oVcVABjTsI

[L Robertson @RobertsonAmps]

Saturday morning, brought to you by the local big box store and chemistry. Now to find my rubber… https://t.co/Zef15WYVuk

[L Robertson @RobertsonAmps]

Hard not to love that warm tube glow.

#mullard #vacuumtubes #tuberectifier #nos #madeingreatbritain

[L Robertson @RobertsonAmps]

Well that took longer than expected. I was able to connect all but two of the dots... nothing a jumper wire can't solve. #kicad #pcb

[L Robertson @RobertsonAmps]

Tomorrow's task = connect the dots (aka PCB layout)
#livingthedream #ratsnest #pcblayout #kicad #prototyping #circuitboard

[L Robertson @RobertsonAmps]

New tunes, old tunes and a new toy. Where to start? #derekandsusan #empresseffects #vintagevinyl #greatfriends