[sdiy] BODE Frequency Shifter

atsushi maeda shine32 at kr.tcp-ip.or.jp
Sat Nov 17 11:12:39 CET 2018


May be, Yes.

I use the MC1496/NJM1496.


Atsushi Maeda

On 2018/11/04 0:56, Tim Ressel wrote:
> I assume the 796 IC shown is a uA796. Is the uA796 the same as the 
> MC1496?
>
> On 11/3/2018 2:29 AM, atsushi maeda wrote:
>> I am making BODE's one, now.
>>
>> Atsushi Maeda
>>
>> On 2018/11/01 7:11, Tim Ressel wrote:
>>> which one are you making?
>>>
>>> --curious
>>>
>>> On 10/30/2018 3:45 AM, atsushi maeda wrote:
>>>> Hi Lists;
>>>>
>>>>
>>>> I am currently producing BODE Frequency Filter.
>>>> I made the board, but I am troubled with adjustment.
>>>> Most of the constants are in accordance with the manual.
>>>> Some of the operational amplifiers have been changed to LF 412, NJM 
>>>> 2114, NJM 2748 A, etc., and 741 is not used.
>>>> Transistors have been changed to 2SA 2015 for PNP and 2SC1815 for NPN.
>>>> The current problem occurred when adjusting DOME Filter.
>>>> It may be adjusted so as to have a phase difference of 90 degrees 
>>>> at 40 Hz, 170 Hz, 725 Hz, 3080 Hz, 13090 Hz, but if I adjusted it 
>>>> to 90 degrees phase difference at 13090 Hz, the phase difference 
>>>> will be 90 degrees at other frequencies It will not be.
>>>> No matter how many times you try to adjust it, it will not change.
>>>> Is my understanding wrong?
>>>>
>>>>
>>>> Cheers,
>>>>
>>>> Atsushi Maeda
>>>>
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