IMF owners thread!
- Thread starter canuckaudiog
- Start date
Yvan_donald
Well-Known Member
Hi,if it"s improved model could have been TW 1400 ferrufluid and STW 2100 ferrofluid, but very hard to find these day"s, the celestion HF 1300 or STW HF 2000 come more often for sale but not ferrofluid. In your set it seems you have a mix of both. Contact Falcon accoustic (UK), ask them if can help you or some another Aker"s can have parts for you?
Yvan_donald
Well-Known Member
Hi,you know the acces is from removing the Woofer, on the serial number at the end do they have letter to say they are improved, but the woofer will have been different, not Kef B-139 sp 1044
Good evening.
Here's some pictures of my drivers. The first three pictures is of the tweeter I think is a HF1300. This driver is burned and have to be replaced or fitted with a new voice coil. The next two pictures shows the other tweeter. I guess the PO tried to replace the old one with this. This driver is missing the plastic cup for mounting it. This driver is a HF1400/ 8ohms as you can se on the back side-picture. The question is what driver is original on this speaker ?
The next two pictures show the supertweeter. Both seems to be original, but one needs replacement. I have the black metal-cover for both drivers. What drivers is this ?
The last two pictures shows the drivers placement on the baffle and a picture of the IMF label.
Here's some pictures of my drivers. The first three pictures is of the tweeter I think is a HF1300. This driver is burned and have to be replaced or fitted with a new voice coil. The next two pictures shows the other tweeter. I guess the PO tried to replace the old one with this. This driver is missing the plastic cup for mounting it. This driver is a HF1400/ 8ohms as you can se on the back side-picture. The question is what driver is original on this speaker ?
The next two pictures show the supertweeter. Both seems to be original, but one needs replacement. I have the black metal-cover for both drivers. What drivers is this ?
The last two pictures shows the drivers placement on the baffle and a picture of the IMF label.
Attachments
The smaller replacement tweeter driver is the IMF / TDL ELAC T1400 which was used in the SACM and the later RSPM Mk. VII. As you can see, it is too small for the original Celestion HF1300 mounting hole. The supertweeter is also an IMF / TDL supertweeter modeled loosely on the Celestion HF2000. This was also used on the SACM and Mk VII. I don't know if IMF supplied what they had, or "upgraded" to this or PO put this in because of superficial resemblance to the previous tweeter.
Wilburchubs
Well-Known Member
Enjoying my re-capped TLS80, with Herbie Hancock-Head Hunters....
Oh man.....
Oh man.....
Yvan_donald
Well-Known Member
Hi,the HF 1400 have no opening holes (3) like the HF 1300 on the magnet the back plate, only the same center hole. But this HF 1400 do it have a plastic cover in the back or it"s usually install flat on a back wall or fix with the flange similar to the HF1300 with open back?
Yes Wilbur love Herbie Hancock, he is so imaginative with the music he make.
Yes Wilbur love Herbie Hancock, he is so imaginative with the music he make.
Mart Mccall
Well-Known Member
Now have the new capacitors to redo the xovers on my TLS50s. I got the Falcon Acoustics kit, I paid the extra for the fine tolerance caps. Just need to pluck up the courage to attempt it. Not soldered in 20 years!
Yvan_donald
Well-Known Member
HI, that's good news, it should be a brise, put back what they are renown for, reproduce natural frequency of every existhing instruments.
Yvan_donald
Well-Known Member
HI some photos of HF 1300
Yvan_donald
Well-Known Member
More photos HF 1300 mk 2 15ohmToday , I did eplace the bipolar electrolytes on the TLS80 II xovers.For now , I did not buy the
Alcaps.I ordered the bipolars from Jantzen , and the same set from Intertechnik , which they name Era ,
and they come as " Raw " or rough foil , bipolars.
Intertechnik is also manufacturing ?? Audyn ??The Jantzen and the Eras are all 100Volt types.
Anyway , I did some measurements , on the 2 sets.As for the ESR , for the new bipolars , it was all oke.
But , there was a bit more spread , in tolerance , on the capacitance , with the Era bp`s.
The Jantzen , were more or less , all within the 10% range or lower.Of course , measuring , about 32 bipolars in total ,
16 for the Jantzen and the Era each , is not a good benchmark.
Here is how the old Elcap bp`s measure :
Left box Right box
ESR ----- Cap`y ESR ----- Cap`y
100uF/50V >>>>> 0.0 ------ 117.6uF 0.0 ------- 117.8uF
60uF/50V >>>>> 0.01 ------ 92.9uF 0.04 ------ 78.4uF
12uF/50V >>>>> 0.38 ------ 13.13uF 0.39 ------ 12.8uF
6uF/50V >>>>> 0.62 ------ 7.28uF 1.0 ------- 6.8uF
4uF/50V >>>>> XX ------ 0.27uF 0.89 ------ 4.6uF
As you can see , 1 of the 4uF bipolars , had a way too high ESR , and the capacity was almost 0.0 - zero .
This 4uF , is in parallel with the 12uF , so as to make a 16uF capacitor.The ESR could not be measured !!!
For almost 37 years , most of these Elcaps , are in still rather good shape.Except for 1 !!!
I did not replace the polyester caps.Because , I wanted to hear , if and what differnce , it would make.
Well , for the moment , I`m very pleased , with the result.It is Obvious , that the fresh bipolars , did made a difference.
Of course the bipolars , need to break in , but the change , is already significant.Will , decide on what to put in , eventually.
Because of the better tolerance , of the Jantzen , I used them , instead of the rough foil Eras.
For now , I will listen , and see , how things will turn out.
Alcaps.I ordered the bipolars from Jantzen , and the same set from Intertechnik , which they name Era ,
and they come as " Raw " or rough foil , bipolars.
Intertechnik is also manufacturing ?? Audyn ??The Jantzen and the Eras are all 100Volt types.
Anyway , I did some measurements , on the 2 sets.As for the ESR , for the new bipolars , it was all oke.
But , there was a bit more spread , in tolerance , on the capacitance , with the Era bp`s.
The Jantzen , were more or less , all within the 10% range or lower.Of course , measuring , about 32 bipolars in total ,
16 for the Jantzen and the Era each , is not a good benchmark.
Here is how the old Elcap bp`s measure :
Left box Right box
ESR ----- Cap`y ESR ----- Cap`y
100uF/50V >>>>> 0.0 ------ 117.6uF 0.0 ------- 117.8uF
60uF/50V >>>>> 0.01 ------ 92.9uF 0.04 ------ 78.4uF
12uF/50V >>>>> 0.38 ------ 13.13uF 0.39 ------ 12.8uF
6uF/50V >>>>> 0.62 ------ 7.28uF 1.0 ------- 6.8uF
4uF/50V >>>>> XX ------ 0.27uF 0.89 ------ 4.6uF
As you can see , 1 of the 4uF bipolars , had a way too high ESR , and the capacity was almost 0.0 - zero .
This 4uF , is in parallel with the 12uF , so as to make a 16uF capacitor.The ESR could not be measured !!!
For almost 37 years , most of these Elcaps , are in still rather good shape.Except for 1 !!!
I did not replace the polyester caps.Because , I wanted to hear , if and what differnce , it would make.
Well , for the moment , I`m very pleased , with the result.It is Obvious , that the fresh bipolars , did made a difference.
Of course the bipolars , need to break in , but the change , is already significant.Will , decide on what to put in , eventually.
Because of the better tolerance , of the Jantzen , I used them , instead of the rough foil Eras.
For now , I will listen , and see , how things will turn out.
Yvan_donald
Well-Known Member
Hi, yes your old caps did good except one, tell me did you use your IMF often like almost everyday or for long period didn't use them? I like to get those ESR -Cap tester do you recommand one.When I change the 6 and 12uf on my prof. , it make big difference mid région, the 2.2 give me better texture and more Space and distinct sound of each instruments, the dominante instrument have more impact on the sound. At good volume sound 11-12 o clock sound great but if I drive to loud the dominante instrument take over,in that case need a much bigger room to get the full potanciel of my speaker.
I use one from E-Bay and it has many other uses. A must for anyone who wants to repair or restore old electronics.
http://www.ebay.com/itm/190912434556?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2648&rmvSB=true
There are a little newer from when I bought mine. I may get one of these as well.
http://www.ebay.com/itm/121546322222?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Athanasios
Yvan_donald
Well-Known Member
Thank you Athanasios, I look at it, it is easy to use for someone like me who doesn't know much on Electronic but love to learn, I need a cours in X-over to understand more.
Yes , it is certainly an improvement.Some days , before the recap , I did listen to the speakers , about 3 times.
So , as to have a fresh image , of the sound.Then I waited for 1 day , to do the recap.
In general , the Elcaps , did rather well , for their age.But the 60uF , was already going , out of spec.
One was 76 and the other was almost 100uF.That certainly would have impacted the sound image.
But , like you mention , to me it seems , that there is an even balanced , sound image now.The instruments ,
are better placed , in the sound stage , and also vocals , do have their strenght and sensitivity.
I know , that it is just the beginning , of these bipolars.But , to me , the change , is already dramatic.And , personally ,
I don`t think , that , you will be able , to hear the differnce , between a 10% or a 2% bipolar.Maybe , with very , very highly
sophisticated , audio gear.
I do believe , that the polypropylene and other foil caps , will have a greater impact , when it comes to their tolerance.
So , for now , I will listen , to how the sound will evolve.
And then , at a later stage , I will replace the Erie polyester ? caps , with polypropylene ones.
But , I must say , these new bipolars , already made a big positive change.
As to what type of meters I use.Well , some years ago , I did order the EVB - ESR meter.It is made in Portugal.
Back then , you could also buy it , as a kit , to built it yourself.
But I bought it completely built and adjusted.
The capacitance meter , I bought from a radio/tv repair shop , that was closing down (because of a retirement).
These days , you can buy , the ones , like Athanasios is using.
On Youtube , some guy , is revieuwing , such a sort of esr/cap meter.But , it has a margin , when displaying the cap value.
The price is about 130 Euros , I believe.
I will not buy , that one , because for me , these are already , enough.And the cap meter , Always gives me the same cap value.
No matter , how many times , I will do the measurement.
So , as to have a fresh image , of the sound.Then I waited for 1 day , to do the recap.
In general , the Elcaps , did rather well , for their age.But the 60uF , was already going , out of spec.
One was 76 and the other was almost 100uF.That certainly would have impacted the sound image.
But , like you mention , to me it seems , that there is an even balanced , sound image now.The instruments ,
are better placed , in the sound stage , and also vocals , do have their strenght and sensitivity.
I know , that it is just the beginning , of these bipolars.But , to me , the change , is already dramatic.And , personally ,
I don`t think , that , you will be able , to hear the differnce , between a 10% or a 2% bipolar.Maybe , with very , very highly
sophisticated , audio gear.
I do believe , that the polypropylene and other foil caps , will have a greater impact , when it comes to their tolerance.
So , for now , I will listen , to how the sound will evolve.
And then , at a later stage , I will replace the Erie polyester ? caps , with polypropylene ones.
But , I must say , these new bipolars , already made a big positive change.
As to what type of meters I use.Well , some years ago , I did order the EVB - ESR meter.It is made in Portugal.
Back then , you could also buy it , as a kit , to built it yourself.
But I bought it completely built and adjusted.
The capacitance meter , I bought from a radio/tv repair shop , that was closing down (because of a retirement).
These days , you can buy , the ones , like Athanasios is using.
On Youtube , some guy , is revieuwing , such a sort of esr/cap meter.But , it has a margin , when displaying the cap value.
The price is about 130 Euros , I believe.
I will not buy , that one , because for me , these are already , enough.And the cap meter , Always gives me the same cap value.
No matter , how many times , I will do the measurement.
