Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: joesatch on February 02, 2022, 02:30:49 pm

Title: Pre-drilled turret boards.
Post by: joesatch on February 02, 2022, 02:30:49 pm

What can you tell me about these type of boards and why someone would want to use them (or not want to use them)?

Title: Re: Pre-drilled turret boards.
Post by: EL34 on February 02, 2022, 02:39:23 pm

They are made from crushed rice paper and fish scales and pressed into 3mm wafers  :icon_biggrin:
The lugs would be metric no doubt?

Title: Re: Pre-drilled turret boards.
Post by: joesatch on February 02, 2022, 02:54:51 pm

i guess it's just a lazy way of doing it. A universal option instead of the right part for the right job. I assume material is sub standard as well. I think the original marshall's used these?

Title: Re: Pre-drilled turret boards.
Post by: Willabe on February 02, 2022, 03:05:43 pm

If your not going to make your own board, then have Doug make it. A lot of guys here have them made by Doug.

He uses a high guilty fiberglass board.

https://el34world.com/Forum/index.php?board=15.0

Title: Re: Pre-drilled turret boards.
Post by: st on February 02, 2022, 03:16:01 pm

A custom board looks nicer, for sure. So go with Doug's offer if you're on the right side of the pond.but boards like the one pictured are available in Europe from reputable sources and the material is just fr4. I've used them, liked them, and can't see why they would be of subpar quality. I've also seen them available from the far east, but can't speak for those.

Title: Re: Pre-drilled turret boards.
Post by: sluckey on February 02, 2022, 03:31:47 pm

Quote from: joesatch on February 02, 2022, 02:30:49 pm

What can you tell me about these type of boards and why someone would want to use them (or not want to use them)?

Can't really tell just from that pic.

Is that board from AES? If so, it's good quality. The black and red are 3mm thick. Other colors are only 2mm. You have to buy their turrets too.

     https://www.tubesandmore.com/products/turret-board-blank-189-holes-10-18-x-2-58

Title: Re: Pre-drilled turret boards.
Post by: uki on February 02, 2022, 05:38:09 pm

If you want/plan making boards look into Celeron it is very strong material and cheap.

Quote

Indicated for mechanical applications, the Celeron is a material with great resistance to the impact and to the wear, excellent noise reducer and with low coefficient of friction. Suitable for the construction of elements subject to heavy loads and wear (good resistance to wear even in aggressive conditions, such as dusty environment). It can be lubricated with water, oil or grease. It is resistant to salt water and various atmospheric conditions.

MAIN CHARACTERISTICS

- Excellent mechanical properties

- High resistance to shock and vibration

- Low wear on parts subjected to continuous friction

- Low coefficient of friction

- Good dimensional stability

APPLICATIONS

- Silent sprockets and sprockets

- Bushings of heavy loads

- Support and transport rollers

- Electrical insulation parts

-I vibration filler

- Sliding plates

- Fuse holder

https://www.polylanema.pt/client/files/0000000001/caleron-datasheet_1671.pdf

Title: Re: Pre-drilled turret boards.
Post by: thetragichero on February 02, 2022, 09:29:00 pm

i dunno it seemed to work okay for early marshalls (https://www.vintageandrare.com/uploads/products/58078/2286621/original.jpg)

Title: Re: Pre-drilled turret boards.
Post by: sluckey on February 04, 2022, 12:33:38 am

Look at the bottom of this page...

      https://ampgarage.com/forum/viewtopic.php?p=437818#p437818

Title: Re: Pre-drilled turret boards.
Post by: PRR on February 04, 2022, 11:12:51 am

Quote from: sluckey on February 04, 2022, 12:33:38 am

Look at the bottom of this page...

Strangers can't see those images. Here's one of the ones you mean.