MV-13 stabistor replacement

stabistor

Hi all,

Need a replacement for MV-13 stabistor if possible using diodes like 1N914, BAV20, BAX16, so on... (It is impossible to find BZX55C1V2). Please send schematic showing how to replace.

Regards,

Fernando

stabistor

Hi Fernando,

You won't find any reference about a BZX55C1V2 because it never existed !
You won't find it either in any other series of voltage regulator diodes
because they all start at 2V4. The only stabistors that might be still
available are the BZV86 and BZV87 series and they come only in 1V4, 2V0,
2V6 and 3V2. You can find the datasheets here:

**broken link removed**

Much older stabistors, the BZX75 series, had the same voltage ratings.
An other possibility is to connect two BA220 diodes in series to get 1v4.
That's what a stabistor basically is, a series connection of a number of
diodes.

If your application permits, you could use a LM113 to get 1,25volt.

**broken link removed**

on1aag.

mv-13yh replacement diode

Hi on1aag,

Very thank you for your prompt reply. This diode MV-13 is part of my deskmic Kenwood MC-85 if you want I can send you the complete schematics supplied by Kenwood America. This diode needs to be replaced and I can't find a replacement one so I'm not sure if LM113 will work.

73,

Fernando - PU2PLL - Brazil

stabistor use

Hi fernando,

The voltage drop over D3 is the DC voltage for the operating point of
the limiter. It's difficult to tell what the outcome of the replacement
will be. The current trough that diode is only about 400 µA, impossible
to say how much the voltage drop was over the SV-13 diode. You gonna have
to try and find out if the changes in the output signal of the compressor
won't be too abrupt and if the setting of the compressor gain won't be
too different from the previous setting. I can only tell you that the
voltage drop is about 1,3V.
Make pairs of two diodes in series from different types. Connect them
via a 10K resistor to a variable power supply and adjust the output
voltage that the current trough these diodes is 400µA and measure the
voltage drop over the diodes. Select a pair that has a voltage drop of
about 1,3V and solder them in the board and observe how the compressor
reacts to the different(?) bias voltage.

on1aag.

mv-13 diod

Dear on1aag,

Very thank you for the explanations. I'll begin the tests today until reach 1,3V with 400uA of current.

73,

Fernando - PU2PLL - Brazil

mv13 datasheet diode

How about the LM385-1.2 from National? **broken link removed**