[sdiy] Help trouble shooting mfos echo rockit

[Pete Hartman]

Excellent!  Glad to hear it.

Pete

On Tue, Nov 22, 2022 at 7:11 PM JoeF <frey at radioles.com> wrote:

> TY to all who helped. I replaced 2 transistors in the filter circuit and
> that got it going! JoeF.
>
>
> Get TypeApp for Android <http://www.typeapp.com/r>
> On Nov 21, 2022, at 10:31 AM, JoeF <frey at radioles.com> wrote:
>>
>> Tx loads to all who helped. I have ordered some appropriate replacement
>> transistors for Q1 and Q2. Will update when replaced.
>> JoeF.
>>
>> Get TypeApp for Android <http://www.typeapp.com/r>
>> On Nov 21, 2022, at 6:47 AM, Tim Stinchcombe <tim102 at timstinchcombe.co.uk>
>> wrote:
>>>
>>> Hi Steve, JoeF and any others following,
>>>
>>>  According to p2 of the schematic, this circuit is operating from a single
>>>>
>>> 9V battery,
>>>
>>>>  with a half-rail "ground" generated by a potential divider.
>>>>
>>>
>>> Which goes to show that I didn't look hard enough for what 'BP' and 'BN'
>>> were - the large 'Powering an Echo Rockit from Your Dual Supply' led me to:
>>>
>>> From the pin 11 reading I am assuming you are trying to run off +9, -9V
>>>>
>>> split
>>>
>>>>  supplies:
>>>>
>>>
>>> And as Samuel Jackson once noted in a film:
>>>
>>> "...everyone knows, when you make an assumption, you make an ass out of
>>> 'you' and 'umption'."
>>>
>>> So now I am feeling a bit of an ass, and thanks for the correction by Steve!
>>>
>>> Thus please ignore what I said, and I concur with the inconsistent readings
>>> between pins 5 & 7!
>>>
>>> Tim
>>> ------------------------------
>>>
>>> Tim Stinchcombe
>>>
>>> Cheltenham, Glos, UK
>>> email: tim102 at timstinchcombe.co.uk
>>> www.timstinchcombe.co.uk
>>>
>>>
>>>
>>>
>>>
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