Eros malfunction [resolved]

Ascari · 5211

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Offline Paul Birkeland

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Reply #30 on: January 27, 2021, 08:06:10 AM
Not tube, tubes.

Any tube in any socket in an Eros shorts C4 to C5.

If the tubes are glowing, there's no issue there.  EF86s glow so dimly that usually you need the lights off to even tell that they are glowing at all.

Paul "PB" Birkeland

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Offline Ascari

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Reply #31 on: January 27, 2021, 09:03:45 AM
I just had the two EF86's and 6922 out.  When I pulled the 4th tube out it read 621 Ohms


Offline Paul Birkeland

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Reply #32 on: January 27, 2021, 10:18:12 AM
Quote from: Paul Birkeland on January 27, 2021, 08:06:10 AM
If the tubes are glowing, there's no issue there. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Ascari

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Reply #33 on: January 27, 2021, 10:54:11 AM
OK.    Looks like the 2n2222's then    Do they have to be the bipolar metal can type?


Offline Paul Birkeland

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Reply #34 on: January 27, 2021, 11:36:10 AM
I would get the metal can type.  Jameco has a good supply of them.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Ascari

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Reply #35 on: January 27, 2021, 11:58:05 AM
Will do.   Stay tuned.


Offline Ascari

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Reply #36 on: January 30, 2021, 08:00:10 AM
The Eros is alive!     i replaced the transistors and viola, voltages came back into line immediately.    I know this was not an easy one, but with your help and persistance it is a success.    You do know that I had just about convinced my wife for a Eros 2.    Maybe for Christmas.

THANK YOU all for your help.


Offline Ascari

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Reply #37 on: January 30, 2021, 08:06:32 AM
PS, one final thought.   It seems strange to me that both transistors went out within a half hour of each other.   Any guesses as to why?   Is there something I should do for prevention?


Offline Doc B.

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Reply #38 on: January 31, 2021, 10:56:46 AM
If it happened after you plugged the tubes in the wrong sockets, that is the likely culprit. Sometimes the transistors can be partly damaged to a point where they work for a while longer before pooping out.

Dan "Doc B." Schmalle
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Bottlehead Corp.

Offline Ascari

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Reply #39 on: February 02, 2021, 01:14:18 PM
Thank you.    That is not what actually happened, I didn't change any tubes until after the failure.  Yes I did destroy a tube on the tube tester   I know this thread is a bit confusing.  None the less, it is working and that is all that I really care about.   You have gone way beyond in helping me and for that you have you have a customer way beyond your expectations.


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