Not really a lot of baffle to put anything on, but yes. All surfaces want a thin layer of something -- we use ~10mm thick cotton felt -- to reduce high frequency reflections back thru the cone.
dave
dave
Ok....one more and I will leave you alone:
By all surfaces do you include the port cavity area, i.e., outer cabinet wall and inner wall that forms the port canal on each side? As you know this is a narrow cavity.
Glad to hear cotton felt is acceptable; I have been struggeling unsuccessfully to find wool felt. Cotton felt 3/8" or 10mm thick is also known as "bump" in the upholstery business and is plentiful, widely available and cheap.
Thanks again Dave,
Ray
By all surfaces do you include the port cavity area, i.e., outer cabinet wall and inner wall that forms the port canal on each side? As you know this is a narrow cavity.
Glad to hear cotton felt is acceptable; I have been struggeling unsuccessfully to find wool felt. Cotton felt 3/8" or 10mm thick is also known as "bump" in the upholstery business and is plentiful, widely available and cheap.
Thanks again Dave,
Ray
The vent areas need to be clear -- don't get the damping to close to the entrance either (ie the piece(s) that fits on the back panel
dave
dave
Fonkens
The Fonkens hae been playing away in the golf cart garage since Sunday. They get sweeter every day.
The Fonkens hae been playing away in the golf cart garage since Sunday. They get sweeter every day.
Fonken cont'd
They are mules and will be rebuilt for better cosmetics if they continue to improve.
I treated the frames with duct seal and glued a felt puck on the back of the magnets. I found the felt at HD...two 4"x 6 1/2" squares 1/4" thick for about $3.00. This made a dramatic change. I will pick up the damar ( $9.00 for 2 1/4 oz. ?!) this weekend at the art supply shop. The Modge Podge was purchased at Michaels last week so I will finish the mods this weekend.
Ray
They are mules and will be rebuilt for better cosmetics if they continue to improve.
I treated the frames with duct seal and glued a felt puck on the back of the magnets. I found the felt at HD...two 4"x 6 1/2" squares 1/4" thick for about $3.00. This made a dramatic change. I will pick up the damar ( $9.00 for 2 1/4 oz. ?!) this weekend at the art supply shop. The Modge Podge was purchased at Michaels last week so I will finish the mods this weekend.
Ray
Re: Fonken cont'd
Ouch. That is about 2x what i paid ($9 CAD for 4 oz). You will have enuff to do many, many speakers. (i've done at least 50 speakers & hardly put a dent in my bottle)
dave
Ray Collins said:
Ouch. That is about 2x what i paid ($9 CAD for 4 oz). You will have enuff to do many, many speakers. (i've done at least 50 speakers & hardly put a dent in my bottle)
dave
Re: Fonken cont'd
Mules. Good one.
I've been building up a considerable amount of scrap
and want to make a mule of the longer Fonken.
These will prob'ly weigh a ton but the glue up pieces
will be fairly easy to glue and trim.
Where in this long thread are the drawings and measures
for the long Fonken?
Ray Collins said:
They are mules and will be rebuilt for better cosmetics if they continue to improve.
I treated the frames with duct seal and glued a felt puck on the back of the magnets. I found the felt at HD...two 4"x 6 1/2" squares 1/4" thick for about $3.00. This made a dramatic change. I will pick up the damar ( $9.00 for 2 1/4 oz. ?!) this weekend at the art supply shop. The Modge Podge was purchased at Michaels last week so I will finish the mods this weekend.
Ray
Mules. Good one.
I've been building up a considerable amount of scrap
and want to make a mule of the longer Fonken.
These will prob'ly weigh a ton but the glue up pieces
will be fairly easy to glue and trim.
Where in this long thread are the drawings and measures
for the long Fonken?
Oh they will. With the drivers well broken in, I think you'll be in love with these little speakers and will want to make them look pretty.
Jeff
loninappleton
I don't remember which post has the plans for the long version but I am sure that Dave could direct you....Dave?
Jeff
You could be right....I looked at a textured finish while at Hobby Lobby earlier today. Also my wife's grandson has already hinted that he likes the Fonkens "as is"....so....
Another comment on the Damar Varnish. I found it at Hobby Lobby under the Grumbacher brand for $4.99 (2 1/2 oz.) and the clerk gave me a coupon for 40% off. It is scarry but it made me identify with me wife's favorite shopping comment...." look how much money I saved". Oh well... I am off to the shop to treat the cones.
Ray
I don't remember which post has the plans for the long version but I am sure that Dave could direct you....Dave?
Jeff
You could be right....I looked at a textured finish while at Hobby Lobby earlier today. Also my wife's grandson has already hinted that he likes the Fonkens "as is"....so....
Another comment on the Damar Varnish. I found it at Hobby Lobby under the Grumbacher brand for $4.99 (2 1/2 oz.) and the clerk gave me a coupon for 40% off. It is scarry but it made me identify with me wife's favorite shopping comment...." look how much money I saved". Oh well... I am off to the shop to treat the cones.
Ray
Re: Re: Fonken cont'd
The BiFonken plans are in the Box Plan Library, and the alternative shaped Fonkens are in a thread on the Full Range Forum... i'll dig them out and post them & then i guess i should get the Fonken parts of this thread split off into their own thread.
dave
loninappleton said:
The BiFonken plans are in the Box Plan Library, and the alternative shaped Fonkens are in a thread on the Full Range Forum... i'll dig them out and post them & then i guess i should get the Fonken parts of this thread split off into their own thread.
dave
Fonken Cones
This is one of the cones after I treated it with Damar and Mod Poge. I used Kiwi black sole and heel dressing to thin the Mod Poge at a ratio of 1 to 1. The color was a very dark grey...almost black...much like a divorce lawyers heart. I applied it with a #5 flat artists brush in a radial pattern. The second coat was thinned with water at about a 1 to 1 ratio which made it flow better for a much smoother finish.
The results were profound. Gone is the harsh edge and shout. It matched the degree of change I experienced with the felt puck and duct seal on the frame treatment. My wife even noticed the changes and remarked how clear they sounded and how much bass they had for such a small speaker.
Thanks Dave....
Ray
This is one of the cones after I treated it with Damar and Mod Poge. I used Kiwi black sole and heel dressing to thin the Mod Poge at a ratio of 1 to 1. The color was a very dark grey...almost black...much like a divorce lawyers heart. I applied it with a #5 flat artists brush in a radial pattern. The second coat was thinned with water at about a 1 to 1 ratio which made it flow better for a much smoother finish.
The results were profound. Gone is the harsh edge and shout. It matched the degree of change I experienced with the felt puck and duct seal on the frame treatment. My wife even noticed the changes and remarked how clear they sounded and how much bass they had for such a small speaker.
Thanks Dave....
Ray
Re: Re: Re: Fonken cont'd
I'm familiar with the full range driver forum but did
not see or recall plans in the 'gallery' they have.
So anything you can repost would be good. No rush.
I'm trying to complete a BIB to see how that works.
planet10 said:
I'm familiar with the full range driver forum but did
not see or recall plans in the 'gallery' they have.
So anything you can repost would be good. No rush.
I'm trying to complete a BIB to see how that works.
