Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
Used by Fender guitar amp company and used eyelets for soldering component
leads into. What was the material made of and how/why does it go bad? I think of it as whale-hide but its probably something like linoleum , compressed linseed etc rather than paper-fibre and lacquer as under x30 veiwing there is no sign of fibrous material |
#2
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
N_Cook wrote: Used by Fender guitar amp company and used eyelets for soldering component leads into. What was the material made of and how/why does it go bad? I think of it as whale-hide but its probably something like linoleum , compressed linseed etc rather than paper-fibre and lacquer as under x30 veiwing there is no sign of fibrous material. Phenolic. -- You can't have a sense of humor, if you have no sense. |
#3
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
Michael A. Terrell wrote in message
... N_Cook wrote: Used by Fender guitar amp company and used eyelets for soldering component leads into. What was the material made of and how/why does it go bad? I think of it as whale-hide but its probably something like linoleum , compressed linseed etc rather than paper-fibre and lacquer as under x30 veiwing there is no sign of fibrous material. Phenolic. -- You can't have a sense of humor, if you have no sense. So is it dyed phenolic? I only ever see brown phenolic material and more rigid, for the thickness, than this Fender stuff. Next time I come across some of it I'll burn a sample - unmistakable smell if phenolic. |
#4
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
This is what the board looks like and as it is used, colour is correct
http://26.media.tumblr.com/tumblr_lb...ao1_r1_250.jpg Will quite readily bend when cold , say .5 inch displacement over a 2 inch run although something like 1/8 inch thick |
#5
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
On 10/5/2011 10:39 AM, N_Cook wrote:
This is what the board looks like and as it is used, colour is correct http://26.media.tumblr.com/tumblr_lb...ao1_r1_250.jpg Will quite readily bend when cold , say .5 inch displacement over a 2 inch run although something like 1/8 inch thick I believe what you're referring to is called "fish paper". A heavy, stiff grey/black cardboard. Phenolic was between orange and brown, considerably stiffer and would crack if bent. Commonly used at the time for those tag strips. Having rows of turret terminals down both sides. A lot of "That turned out to be a bad idea" techniques were attempted in the late '50s through the early '70s to eliminate point to point chassis wiring. Not all items, and especially "consumer" items were designed with the idea "This should last forever". That as many items built as far back as the '20s are still serviceable is more by accident and over engineering that by conscience design. Jeff -- "Everything from Crackers to Coffins" |
#6
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
On Oct 5, 6:40*am, "N_Cook" wrote:
Used by Fender guitar amp company and used eyelets for soldering component leads into. What was the material made of and how/why does it go bad? I think of it as whale-hide but its probably something like linoleum , compressed linseed etc rather than paper-fibre and lacquer as under x30 veiwing there is no sign of fibrous material What color is it and how thick is it? Circuit boards in general "go bad" because they absorb moisture, they fail mechanically because of stress from soldered parts or the weight of soldered parts, they become covered with conductive filth, or they arc-track because of sustained high voltages. |
#7
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
N_Cook wrote:
http://26.media.tumblr.com/tumblr_lb...ao1_r1_250.jpg That's too small and too poorly lit to be very useful. An image 300% the size would have been better. something like 1/8 inch thick Jeffrey Angus wrote: I believe what you're referring to is called "fish paper". A heavy, stiff grey/black cardboard. That's the closest thing that matches the description, but the thickest stuff I've seen is nowhere near 0.125". http://google.com/search?tbs=dfn:1&q=fish-paper As spamtrap alluded to, without some kind of coating, this stuff sucks up moisture. |
#8
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
"Michael A. Turd" Nutcase Kook Used by Fender guitar amp company and used eyelets for soldering component leads into. What was the material made of and how/why does it go bad? I think of it as whale-hide but its probably something like linoleum , compressed linseed etc rather than paper-fibre and lacquer as under x30 veiwing there is no sign of fibrous material. Phenolic. ** Brrrrraaaapp WRONG !! ..... Phil |
#9
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
"spamtrap1888" Used by Fender guitar amp company and used eyelets for soldering component leads into. What was the material made of and how/why does it go bad? What color is it and how thick is it? ** Grey, about 0.5mm thick. Circuit boards in general "go bad" because they absorb moisture, ** This stuff is a moisture absorber - something well known to Fender and others who used it. Sooo, they hot impregnated it with wax !!! The KOOK has failed to mention this crucial fact. The hot wax treatment is not 100% effective and if the item is left in damp storage for a long time, moisture gets into the material. Re-heating and melting the wax has no good effect. The material is like stiff cardboard and was used as SECONDARY electrical insulation in transformers, ie to separate windings from the core. Such transformers were vacuum impregnated in varnish after manufacture which made the grey material insulate OK. .... Phil |
#10
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
Phil Allison wrote: Turd Is it your lunch time already, Phyllis? -- You can't have a sense of humor, if you have no sense. |
#11
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
En el artículo , N_Cook
escribió: What was the material made of and how/why does it go bad? Paxolin? -- (\__/) (='.'=) (")_(") |
#12
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
Searching "vulcanized fiber board" will reveal many suppliers of this
cellulose material. http://www.emipapers.com/electrical-insulation.html I've recently seen a couple of US sources where this VFB material can be purchased.. Stew Mac for making guitar pickups or other items, and Antique Electronic Supply for using as general insulating material. The VFB material has long been used for making switches, terminal boards and numerous applications where Bakelite or other materials had previously been used. VFB is typically die-cut to shape and holes are generally punched during the same operation. A different, flexible material is "insulating cambric" which can be sheet material or tubing.. often amber in color, and often placed between terminals and surrounding parts. There are basically no perfect insulators, only some that are better than others, and most importantly in recent decades, some that are cheaper than others. -- Cheers, WB .............. "N_Cook" wrote in message ... Used by Fender guitar amp company and used eyelets for soldering component leads into. What was the material made of and how/why does it go bad? I think of it as whale-hide but its probably something like linoleum , compressed linseed etc rather than paper-fibre and lacquer as under x30 veiwing there is no sign of fibrous material |
#13
Posted to sci.electronics.repair
|
|||
|
|||
circuit board material of the 1960s
On Oct 6, 10:53*am, "Wild_Bill" wrote:
Searching "vulcanized fiber board" will reveal many suppliers of this cellulose material. http://www.emipapers.com/electrical-insulation.html I've recently seen a couple of US sources where this VFB material can be purchased.. Stew Mac for making guitar pickups or other items, and Antique Electronic Supply for using as general insulating material. I see AES sells tag and turret boards made of more reasonable looking material. Search he http://www.tubesandmore.com/ |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Cutting Board material | Woodworking | |||
Fascia board material | Home Repair | |||
Ideal Notice Board Material? | UK diy | |||
I have a 4x8 sheet of that clip board material (hardboard) for a bench top. | Woodworking | |||
I have a 4x8 sheet of that clip board material (hardboard) for a bench top. | Woodworking |