Lrl from Italy

[afshin]

Hi Taxma
Your project is very good,I have a question Mr Taxma:
What is the number of ferrite beads used in this circuit?
(Number or mark)
Thanks

[taxma1981]

I dont know my friend,not something writes,a friend gave me this ferrite,this man make radio

[afshin]

Thanks Taxma

[darkman]

Hi darkman,

The values seem correct, the correct value of sensitivity is a bit less than the beginning of the compass effect. Have you tried this test? If you are unable to have this effect means that there is not enough amplification. This is confirmed by the fact that you are using 6.6pF for C2, C3 and C4, typically this value is about 1pF. Also for the gain of the stage it is the rule that maximum gain is before the stage starts to self oscillate. Controls the gain of TR2, TR3 and Tr4, beta must be 500 or higher, try to lower the value of R10-R12 from 1K to 560 ohms or less. Of course there is also the possibility that the buried metal not issue the "phenomenon."

Best regards

Thx mr franco ..
I mean that I removed c2, c3, c4 then I put 1capester 6.6pf .. sorry for my English
Thx

[darkman]

Thx mr franco ..
I mean that I removed c2, c3, c4 then I put 1capester 6.6pf .. sorry for my English
Thx

sorry i was Wrong , (2 of 1pf capacitor in parallel +1pf in series) total capacity of c2,c3,c4 is 1.5pf ..

regards

[eroll]

Hello

I want to add sprint lay file of abdou2014 picture of 8mhz version

I added 470 k pot I hope İt is correct place

[Nicolas]

Hello

I want to add sprint lay file of abdou2014 picture of 8mhz version

I added 470 k pot I hope İt is correct place

Hi Erol.

Thank you welcome at our forum

best regards
Nicolas

[eroll]

Hello All

Abdou2014 sprint lay6 file at link 8mhz Franko İtaly Lrl

https://yadi.sk/d/MyhXySWExGNC2

Abdou are you success to built this version?

any hint ?

[abdou2014]

Other version with varicap diode

[GOLDEN LILLY]

LRL

Here is my LRL based on franco's design.

[GOLDEN LILLY]

lrl

Why is it my attachment cannot be viewed? I followed instructions to post image here in manage attachment but still it cannot be viewed.

[pigeon]

aulook

Why is it my attachment cannot be viewed? I followed instructions to post image here in manage attachment but still it cannot be viewed.

[GOLDEN LILLY]

My Franco lrl... Very sensitive. I have not yet tested on the field. But initial test is promising..

Regards...

[FrancoItaly]

well done, I see you've also put a compass, it is almost essential because the response is very dependent on direction and is maximum in the axis north / south.

Best Regards

[GOLDEN LILLY]

Yes, it is necessary to put a compass directly visible to the operator to know where is north and south, as this lrl, accordingly, will detect only in north and south directions. However, mine detects not north and south but NE and SE. Why?...

regards...