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Offline bernte_oneTopic starter
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« Reply #60 on: July 11, 2015, 07:51:48 am »
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i talk from the 100k trimmer under the ic 4053

where do you have a 200r trimmer for TX osc?   which layout do you use? picture please

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« Reply #61 on: July 11, 2015, 10:39:01 am »
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Yes Bernte_one, that is the trimmer we talk about "r30" and it is 100K, I use that to
adjust best amplification without chirps and clicks, but before that, I just replace
"R38" in TX osc with trimpot and adjust alternately TX amplitude and RX amplification.
Here are pictures of scheme and PCB. And another thing: TX coil is 0,5mm wire*45
and RX =0,25mm *145 on 25,5cm, just the one i use for MOLE-m = 8,4 Khz.
I hope that all of this is understandable (My English again).
Dragan         

Posted on: July 11, 2015, 10:31:53 am
PCB and sch

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Offline bernte_oneTopic starter
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« Reply #62 on: July 12, 2015, 01:23:26 am »
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did you try to fine adjust the caps on rx stage
i use 22nf instead of 47nf  direct right besides the rx connector is also a empty place for another cap
you could test to place some different caps there to get values between the values of the regular line

i hope you understand
i have posted my exact coil and condensator specs some sides before tx 330nf rx 22nf     i think your coil is good  maybe just some little better values at the caps can help you?

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« Reply #63 on: July 12, 2015, 11:07:28 am »
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Yes Bernte_one,  I can understand You quite well, actually my problem is writing
because my Engilish lessons in school were finished many years ago.
At first I have to thank You an Xavier for very, very nice explanation of
this device and good will to share  Yours knowledge with us.
And then, I know about this free place for cap in RX because I read   carefully
every reply in this post, but ,for null the coil I use my little device: tx osc with place to
connect cap and coil and test points for frequency meter, then connectors for rx coil and cap
with little preamp and test points for sound card scope. Until now it works OK.
Actually, I will be thankful if You and other guys  look at this AGEB circuit and say Your  opinion.
Regard: 

Posted on: July 12, 2015, 11:00:15 am
There is one free gate in CD4053 at admiral circuit.

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« Reply #64 on: July 16, 2015, 04:31:28 am »
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Quote:Posted by bernte_one
i talk from the 100k trimmer under the ic 4053

where do you have a 200r trimmer for TX osc?   which layout do you use? picture please

There's no trimmer under the 4053 at least not on my board,  where does this trimmer get connected?

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« Reply #65 on: July 16, 2015, 08:21:38 am »
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Quote:Posted by xavier
There's no trimmer under the 4053 at least not on my board,  where does this trimmer get connected?


The only 100k trimmer I saw  on his schematic was R38. Don't have an Admiral . Sounds like everyone is having problems.

Dusty Carl

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Offline bernte_oneTopic starter
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« Reply #66 on: July 16, 2015, 09:20:20 am »
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look on my first posting

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« Reply #67 on: July 16, 2015, 12:16:01 pm »
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 Shocked why don't I have that on my board?  I'm in hospital at the moment but as soon as I'm back home I'm going to check on that. What is the purpose of that trimmer?

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« Reply #68 on: July 18, 2015, 01:16:15 pm »
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Hi Xavier
in this case (admiral-1, or admiral-final 0613), it is R30, but there are a
plenty of variations and they are all different, so it is not important do
You have it or not. Here is just an  example:
regard 

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« Reply #69 on: July 18, 2015, 04:32:15 pm »
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Quote:Posted by bernte_one
look on my first posting

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Hello Bernte_One I don't know if you've been ask this on previous post but I want to ask you again to get some info.,what is the good's of ADMIRAL
compare to other VLF such as IDX Pro and TGSL?

Thanks my friend!..

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