Sadly Tandberg is now owned by Cisco and in the upcoming production the name will dissapear. Not that I have anything against Cisco, but I rate Tandberg Video Conferencing Technology.
Eivind,
please pardon my clownesque behaviour (it's a curse), i'm all too familiar with each of the names you dropped.
With Mr Malmin too, he's a diyA member, i've exchanged words with Roar both here and privately.
I've monitored audio from Norway since the early 80s, still do, i even frequent Norwegian audio fora regularly for a read and a check-up.
Unnskyld meg.
Last edited:
When you are into Norwegian audio names. Don't forget Stig Inge Bjørge - (Lyra - LYRA - Welcome raised a couple of miles from where I live)
Bjørn Erik Edvardsen from the BEE series of NAD
Krestian Pedersen - product manager B&W (well he may be danish 🙂 )
BTW: Not everything I read in the Norwegian magazine Fidelity (and others) seems quite objective. As most other reviewers and magazines they tend to prioritize the products from their homeland.
All in all - we build good quality components here, but so does alot of others.
Spoke to Tandberg emplyees a couple of weeks ago - they were in fact quite happy about the cisco takeover. Alot of new opportunities and markets are raising for this company.
Anyway . I post earlier Nagys said that mimesis 3 would be almost impossible to clone because of the design, number of components etc. It seems very possible now...
Bjørn Erik Edvardsen from the BEE series of NAD
Krestian Pedersen - product manager B&W (well he may be danish 🙂 )
BTW: Not everything I read in the Norwegian magazine Fidelity (and others) seems quite objective. As most other reviewers and magazines they tend to prioritize the products from their homeland.
All in all - we build good quality components here, but so does alot of others.
Spoke to Tandberg emplyees a couple of weeks ago - they were in fact quite happy about the cisco takeover. Alot of new opportunities and markets are raising for this company.
Anyway . I post earlier Nagys said that mimesis 3 would be almost impossible to clone because of the design, number of components etc. It seems very possible now...
Pleased to hear Tandberg employees are happy with Cisco. Hopefully they will continue to make great products under a different banner.
Hi,
I had sent message about the boards to members who had ordered for boards before or around 9/11. For members who had sent request (after 20/11) for invoice but never get it, please sent again. I had been all mixed up with names, forum ID, email add.. paypal a/c so I might have missed your request.
I had sent message about the boards to members who had ordered for boards before or around 9/11. For members who had sent request (after 20/11) for invoice but never get it, please sent again. I had been all mixed up with names, forum ID, email add.. paypal a/c so I might have missed your request.
The Goldmund boards arrived
Hallo all,
The boards arrived here in The Netherlands Bigpanda thanks.
It’s difficult to make a good picture, I make the pictures close by the window.
Rudy
Hallo all,
The boards arrived here in The Netherlands Bigpanda thanks.
It’s difficult to make a good picture, I make the pictures close by the window.
Rudy
Attachments
Last edited:
Bigpanda
Nice boards. Thank you. I hope to order a pair extra for my friend Roar Malmin
later. Its depends on if my attempts will be a success or not.
Questions: Protection: R24/C6/C7. They are not on the original schema, and I do not find any place for them on the PCB.
Explain this for me, please.
R 25? Where. Underneath???
C1 on the amplifier is orginaly 47 pF. This can be changed to 4,7-10 uF and placed on "optional". Right???
Eivind Stillingen
Nice boards. Thank you. I hope to order a pair extra for my friend Roar Malmin
later. Its depends on if my attempts will be a success or not.
Questions: Protection: R24/C6/C7. They are not on the original schema, and I do not find any place for them on the PCB.
Explain this for me, please.
R 25? Where. Underneath???
C1 on the amplifier is orginaly 47 pF. This can be changed to 4,7-10 uF and placed on "optional". Right???
Eivind Stillingen
Hi Liliya,
I thought you are getting them just before Xmas. Good to see that you had almost done with the soldering.
protection :
the resistors and caps that you mentioned are on the original protection schematic that I have. Please see the other link. They are actually on the main amp. circuit and it takes me a while to recognize them when I first examined the protection circuit.
main amp :
C1 is 47pf but not the optional one. The optional cap. is there when I first receive the pcb file from alex and since it is purely optional, so I just leave it there. There are 2 signal inputs, one of which includes the "optional" while the other doesn't.
"My data book says that the BC 546 B is equivalent to BC 182 B. But I mean to remember that in a previous post it has been mentioned anything that the T5/6 must be BC182B". Nagys mentioned that we can use BC546B for T5/6 in his former posts, please check. I am almost 100% sure that's what he said though I don't know if that is so. There are extra pad holes for these alternatives (also bc449 in protection), please do not put into the wrong hole!!!!
I found that the ECF line of product seems to be a bit cheaper that the BUZs, please comment.
Other link for information :
FileFactory Folder view - goldmund
I thought you are getting them just before Xmas. Good to see that you had almost done with the soldering.
protection :
the resistors and caps that you mentioned are on the original protection schematic that I have. Please see the other link. They are actually on the main amp. circuit and it takes me a while to recognize them when I first examined the protection circuit.
main amp :
C1 is 47pf but not the optional one. The optional cap. is there when I first receive the pcb file from alex and since it is purely optional, so I just leave it there. There are 2 signal inputs, one of which includes the "optional" while the other doesn't.
"My data book says that the BC 546 B is equivalent to BC 182 B. But I mean to remember that in a previous post it has been mentioned anything that the T5/6 must be BC182B". Nagys mentioned that we can use BC546B for T5/6 in his former posts, please check. I am almost 100% sure that's what he said though I don't know if that is so. There are extra pad holes for these alternatives (also bc449 in protection), please do not put into the wrong hole!!!!
I found that the ECF line of product seems to be a bit cheaper that the BUZs, please comment.
Other link for information :
FileFactory Folder view - goldmund
Bigpanda wrote
"protection :
the resistors and caps that you mentioned are on the original protection schematic that I have. Please see the other link. They are actually on the main amp. circuit and it takes me a while to recognize them when I first examined the protection circuit".
It is R24/C6/C7 we are talking about:
PCB consists of a protection section on the left and the amplifier section on the right side.
Alex has "moved" R24/C6/C7 from the protection section over to the amplifier section on the right and given them "new names".
Now R24 =R37. C6 = C28 and C7 = C27.
Bigpanda I think it would be a good idea to create a small explanatory note about this on your attached pdf files.
Bigpanda wrote:
"There are extra pad holes for these alternatives (also bc449 in protection), please do not put into the wrong hole!!!!"
Using BC 546B instead of BC 182B and MPSA 42 instead og BC449: No problems with ECB becauce they have the same pin configuration.
I will go to the first posts in this threads to find out what Nagys has said
about replacing BC182B with BC546B
Eivind Stillingen
"protection :
the resistors and caps that you mentioned are on the original protection schematic that I have. Please see the other link. They are actually on the main amp. circuit and it takes me a while to recognize them when I first examined the protection circuit".
It is R24/C6/C7 we are talking about:
PCB consists of a protection section on the left and the amplifier section on the right side.
Alex has "moved" R24/C6/C7 from the protection section over to the amplifier section on the right and given them "new names".
Now R24 =R37. C6 = C28 and C7 = C27.
Bigpanda I think it would be a good idea to create a small explanatory note about this on your attached pdf files.
Bigpanda wrote:
"There are extra pad holes for these alternatives (also bc449 in protection), please do not put into the wrong hole!!!!"
Using BC 546B instead of BC 182B and MPSA 42 instead og BC449: No problems with ECB becauce they have the same pin configuration.
I will go to the first posts in this threads to find out what Nagys has said
about replacing BC182B with BC546B
Eivind Stillingen
Hi Liliya
if you look at this from the "other link"
GOLD-PROT-new2.jpg
I had made some changes (or additional) in red : the elec. cap polarities, the components designator and also 2 red square. The red squares are what you are doubting. I also mention this in some past post in the original thread. If you are going thru the old posts, please find for me where they are. Tks
Tony
if you look at this from the "other link"
GOLD-PROT-new2.jpg
I had made some changes (or additional) in red : the elec. cap polarities, the components designator and also 2 red square. The red squares are what you are doubting. I also mention this in some past post in the original thread. If you are going thru the old posts, please find for me where they are. Tks
Tony
Eivind wrote:
"I will go to the first posts in this threads to find out what Nagys has said
about replacing BC182B with BC546B."
In #553 Nagys wrote:
"godfrey (or anyone else kind enough) - Can you please do a quick simulation using -60V and using the T5, T6, D1, R11, and R12 from the latest schematic that Alex posted? Post #549. If you can, please do two separate simulations, with T6 connected both ways (Base and Collector shorted and 6V Zener diode connected to the Emitter. And Base and Emitter shorted and 6V Zener diode connected to the Collector). You can substitute any NPN transistor for T6 and T5, please make them the same (You can use BC182B, BC449, BC546B, MPSA93, MPSA92, etc.). Please show voltages at T6's Emitter, T6's Collector, T5's Collector, and T5's Emitter in both simulations. If the voltage difference is substantial, then it might unbalance the circuit. Can you also, if possible, please post the current and any gain changes. This should put this argument to rest. Thank you!"
Bigpanda van you please explain:R 25? Where. Underneath???
Eivind Stillingen
"I will go to the first posts in this threads to find out what Nagys has said
about replacing BC182B with BC546B."
In #553 Nagys wrote:
"godfrey (or anyone else kind enough) - Can you please do a quick simulation using -60V and using the T5, T6, D1, R11, and R12 from the latest schematic that Alex posted? Post #549. If you can, please do two separate simulations, with T6 connected both ways (Base and Collector shorted and 6V Zener diode connected to the Emitter. And Base and Emitter shorted and 6V Zener diode connected to the Collector). You can substitute any NPN transistor for T6 and T5, please make them the same (You can use BC182B, BC449, BC546B, MPSA93, MPSA92, etc.). Please show voltages at T6's Emitter, T6's Collector, T5's Collector, and T5's Emitter in both simulations. If the voltage difference is substantial, then it might unbalance the circuit. Can you also, if possible, please post the current and any gain changes. This should put this argument to rest. Thank you!"
Bigpanda van you please explain:R 25? Where. Underneath???
Eivind Stillingen
Liliya,
If you take a look at post#219 of the original thread :
http://www.diyaudio.com/forums/solid-state/174468-very-best-amplifier-i-have-ever-heard-22.html
R25 should be 0R22 3W not 1K. So the 2 red box are just extension from the main circuit and can be eliminated from the protection schematic.
T
If you take a look at post#219 of the original thread :
http://www.diyaudio.com/forums/solid-state/174468-very-best-amplifier-i-have-ever-heard-22.html
R25 should be 0R22 3W not 1K. So the 2 red box are just extension from the main circuit and can be eliminated from the protection schematic.
T
Hi,
I would like to announce that the lot I have at hand is almost gone with only 3 pairs left. If anyone who had ordered and paid haven't yet receive their boards (payments prior to Feb 1), please show their hands. If no hands shown, I will let go of the 3 pairs if any other member is asking for them.
If anyone doesn't want to do his own L bracket, please contact me. I had other components as slacks as I am trying to gather them. So contact me if you do not want to snoop around for them.
I would like to announce that the lot I have at hand is almost gone with only 3 pairs left. If anyone who had ordered and paid haven't yet receive their boards (payments prior to Feb 1), please show their hands. If no hands shown, I will let go of the 3 pairs if any other member is asking for them.
If anyone doesn't want to do his own L bracket, please contact me. I had other components as slacks as I am trying to gather them. So contact me if you do not want to snoop around for them.
Hi Bigpanda, I have sent you an email about my interest in one pair of the remaining boards (+ L brackets).
Regards,
Dave
Regards,
Dave
Boards available
I had some ‘crippled’ boards when my vendor made a trial run for my order 3 months ago. I had examined them last week and come to the conclusion that with some touch-up, they can be used.
For the 10 medium size electrolytic caps C33, C35, C9, C12, C18, C15, C19, C16, C17, C14 in the main circuit, the pad holes are undersized. For these 10 caps, with the exception of C18, C15, every lead has a ‘spare’ hole which was first implemented to take care of pitch problems. If we drill thru 2 holes (1 for each pole), destroying the plate-thru in them, its "shadow" hole which had not gone thru any rework will still provide connection between the top and bottom pads. For C18, C15, we can overcome the problem by drilling an extra hole next to the original hole connecting the top copper plane but not thru it, retaining the plate-thru within the hole. For the ‘partner’ hole which has no connection to the top copper layer, we can drill right thru it w/o problem because it is soldered on the bottom side where tracks are running into anyway. We can also use this method for treating the electrolytic caps (which do not have spare holes) on the protection circuit also. But of course, the soldering will not be exactly like normal for the reworked pads and these caps will be slightly off position when view from top of pcb.
You can have these for $34 / pair (which includes shipping + handling) Please send order to tony_chan_cf@email.com with forum ID, paypal a/c, no. of pairs, /w subject : "order white silkscreen GM boards".
I had some ‘crippled’ boards when my vendor made a trial run for my order 3 months ago. I had examined them last week and come to the conclusion that with some touch-up, they can be used.
For the 10 medium size electrolytic caps C33, C35, C9, C12, C18, C15, C19, C16, C17, C14 in the main circuit, the pad holes are undersized. For these 10 caps, with the exception of C18, C15, every lead has a ‘spare’ hole which was first implemented to take care of pitch problems. If we drill thru 2 holes (1 for each pole), destroying the plate-thru in them, its "shadow" hole which had not gone thru any rework will still provide connection between the top and bottom pads. For C18, C15, we can overcome the problem by drilling an extra hole next to the original hole connecting the top copper plane but not thru it, retaining the plate-thru within the hole. For the ‘partner’ hole which has no connection to the top copper layer, we can drill right thru it w/o problem because it is soldered on the bottom side where tracks are running into anyway. We can also use this method for treating the electrolytic caps (which do not have spare holes) on the protection circuit also. But of course, the soldering will not be exactly like normal for the reworked pads and these caps will be slightly off position when view from top of pcb.
You can have these for $34 / pair (which includes shipping + handling) Please send order to tony_chan_cf@email.com with forum ID, paypal a/c, no. of pairs, /w subject : "order white silkscreen GM boards".
Don't you feel ashamed offering defective boards for $34 a pair? 
I bet your cheap low quality Chinese board manufacturer gave you the crippled boards for free. No manufacturer would be so barefaced like you to charge for crippled boards.
I bet your cheap low quality Chinese board manufacturer gave you the crippled boards for free. No manufacturer would be so barefaced like you to charge for crippled boards.
Interest party please check these documents here :
FileFactory Folder view - gm_white
for your touch-up. I will check again the traces (shouldn't be any problems because I did not change others rather than the pad hole size) before I will send invoice.
FileFactory Folder view - gm_white
for your touch-up. I will check again the traces (shouldn't be any problems because I did not change others rather than the pad hole size) before I will send invoice.