Pot knob wanted for Armstrong 400 series - UK Vintage Radio Repair and Restoration Discussion Forum

cooperman · 5th Dec 2022, 5:30 pm

I've been fixing an Armstrong 426 tuner/amp. Unfortunately the innards of one of the knobs has crumbled. I was wondering if anyone might have a spare one they could sell to me? The knobs for the later more common 500 series do not fit unfortunately.

As the outer shell of the knob is still OK, it might be possible to glue a smaller knob inside it. If no-one has an original item, perhaps someone has one that has an an outside diameter of 16mm or less and is suitable for a 1/4 (6.4mm) D type shaft?

Thanks in advance for any help with this.

Some pictures are attached.

Restoration73 · 5th Dec 2022, 7:36 pm

I don't have an original knob, but one that will do your second solution.

Send a PM if of interest.

captainpugwash · 6th Dec 2022, 10:28 am

Good morning,
I have this Armstrong knob but without the black side nib.
I think it came from a long gone tuner of that era.
If it is any good drop me a pm and you are welcome to it foc.
Kind regards,
David

captainpugwash · 6th Dec 2022, 10:32 am

Forgot to add the picture….senior moment….honest.
David

cooperman · 12th Dec 2022, 10:26 am

Many thanks to both captainpugwash and Restoration73. Mods please close this thread.

5th Dec 2022, 5:30 pm	#1
cooperman Tetrode Join Date: Feb 2018 Location: Cheshire, UK. Posts: 84	Pot knob wanted for Armstrong 400 series I've been fixing an Armstrong 426 tuner/amp. Unfortunately the innards of one of the knobs has crumbled. I was wondering if anyone might have a spare one they could sell to me? The knobs for the later more common 500 series do not fit unfortunately. As the outer shell of the knob is still OK, it might be possible to glue a smaller knob inside it. If no-one has an original item, perhaps someone has one that has an an outside diameter of 16mm or less and is suitable for a 1/4 (6.4mm) D type shaft? Thanks in advance for any help with this. Some pictures are attached. Attached Thumbnails

5th Dec 2022, 7:36 pm	#2
Restoration73 Nonode Join Date: Jun 2013 Location: Surbiton, SW London, UK. Posts: 2,724	Re: Pot knob wanted for Armstrong 400 series I don't have an original knob, but one that will do your second solution. Send a PM if of interest.

6th Dec 2022, 10:28 am	#3
captainpugwash Hexode Join Date: Jan 2015 Location: Bishop Auckland, County Durham, UK. Posts: 368	Re: Pot knob wanted for Armstrong 400 series Good morning, I have this Armstrong knob but without the black side nib. I think it came from a long gone tuner of that era. If it is any good drop me a pm and you are welcome to it foc. Kind regards, David

6th Dec 2022, 10:32 am	#4
captainpugwash Hexode Join Date: Jan 2015 Location: Bishop Auckland, County Durham, UK. Posts: 368	Re: Pot knob wanted for Armstrong 400 series Forgot to add the picture….senior moment….honest. David Attached Thumbnails

12th Dec 2022, 10:26 am	#5
cooperman Tetrode Join Date: Feb 2018 Location: Cheshire, UK. Posts: 84	Re: Pot knob wanted for Armstrong 400 series Many thanks to both captainpugwash and Restoration73. Mods please close this thread.