TM 808 White's

[detectoman]

hello kt315 i nedd circuit schematics of dm, old discovery two antens, model tf600 treasurefinder is some tipe discovery electronics inc, have two knobs for ground null
please can you help in these cuestion
thanks for your attention
detectoman

[kt315]

still here what I did say about - first blur copy and the schematic.

your faithful friend.

[ivconic]

Thank a lot for posted photos KT315!
Regards!

[kt315]

David, thanks lots again!

[kt315]

sorry ivconic for some delay. yes, you do the real your Home Work. great and hard work. my greetings to you! but I must note on some moments here and now... because in real I did not nothing on the subject

1. the schematic of TM-808. was done by Demon (remember this name plz). he cleaned blur copy and got very clear picture.

2. SMD version. was done by Vel. he wrote it worked just fine! but he changed off only PCB, did not repeat coils. he has access to brand TM-808. he only did put this PCB in SMD and got the result. he did the layout in Protel DXP.

3. coils' construction is very important if we want to wise up the schematic. TM-808 is only full copy of one from all modes of 5900 DI PRO (or 6000 DI PRO). it only repeats one static mode. these tiny PCB's in the coils must do some phase difference/offset similar to as it done in ordinary planar coil of 5900-6000 (Classic's etc. also). David sent some photos on the PCB's to me, but these are on TM-800 and has very bad resoliution and blured so, we have nothing info on the phase , but it must be these descrided 40-100 grades, accordingly to the patent you must be well aware of.

truly yours

[Archi]

ST capacitors

Hi kt315,
Thank's for helpful information.It is very important becouse it means that in this places must be employed capacitors should own simillar features as polystyrene capacitors, which they are not produced praesently,as far as I know.I think first of all should be stable temperature.Is possible it to employ ceramic capacitors here,for instance based on X7R as dielectric?

Regards,
Archi

[kt315]

Hi friends,
As I see some capacitors on scheme are marked letters "ST".
Are they polystyrene capacitors,called in Europe "styroflex" or "styrol" ?

Archi

hello Archi,
enjoy this info on the capacitors' marking american standart (I believe it is).

[erolunall]

Hello

nobody finished this project?

regards
Erol

[Archi]

Capacitors marked letters "ST"

Hi friends,
As I see some capacitors on scheme are marked letters "ST".
Are they polystyrene capacitors,called in Europe "styroflex" or "styrol" ?

Archi

[Leto]

oops

Noticed that resolution of above picture really sucks on magnification.. sorry.
Here's better one.
Regards

[GTK]

Thanks Leto I ment just the same picture you posted here. You are right for that its not 'a must' but the error check will be easier with the component placement picture you've just posted.

[Leto]

Parts

There will be small problem with components placement since there isn't a picture with the boards +components values

This is not such a major problem as pictures of the board are posted right in this thread ... but to make things even easier I extracted parts placement from scans and here it is.
GTK I suggest you assemble board looking closely at shematic (parts placement only for quick help) this way you'll learn much more of the project, also this way you will check the board for mistakes.

[GTK]

There will be small problem with components placement since there isn't a picture with the boards +components values

[ivconic]

Bravo!


Bravo! Thanks!
Regards!

[Leto]

BOT

preview 2