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Old 25th February 2011, 01:13 PM   #1471
Krisfr is offline Krisfr  United States
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Does anyone know of a source of the L90-24W relay used in this project? A source in the USA would be great...Cost?
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Old 25th February 2011, 08:45 PM   #1472
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Quote:
Originally Posted by Krisfr View Post
Does anyone know of a source of the L90-24W relay used in this project? A source in the USA would be great...Cost?
Contact OMRON or FINDER they have offices over yonder, look them up and look for the sales office.
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Old 25th February 2011, 08:59 PM   #1473
hotzman is offline hotzman  Romania
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Hi Krisfr!

Farnell Export
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Old 25th February 2011, 09:47 PM   #1474
Liliya is offline Liliya  Norway
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I have a simpel idea how to do a better DC regulation for Goldmund.

I want to find a subistute for MPSA 42 that match. This trans must have basis as the middle legs. I want to mount them on a common heatsink.

Does any of you have a good idea?

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Old 25th February 2011, 10:15 PM   #1475
Liliya is offline Liliya  Norway
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Krisfr

If Omron is an alternative for you, se #1206. There you will find the datasheet for the Omron type that I use in my Goldmund.


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Old 25th February 2011, 11:13 PM   #1476
Liliya is offline Liliya  Norway
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Is this a silly idea: T3/4 can be both BC546B and MPSA 42. Is it possible to combine them to a "pair"( base=same, emitter and collector are opposite) and mount them face to face and tie them together????????

My purpose is the same as I wrote in # 1474.

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Old 26th February 2011, 12:03 AM   #1477
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For a dissipation of less than 40 mW ?
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Old 26th February 2011, 07:16 AM   #1478
Liliya is offline Liliya  Norway
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No, for thermal contact. DC is till a bit "uneasy". I am looking for one way to do DC more stable.


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Old 26th February 2011, 10:04 AM   #1479
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Dissipation in T3/T4 is about 40mW, a BC546 handles 500mW Max.
Means they barely get warm, so temperature fluctuation of T3 (T4) will be marginal.
Putting a sock over the two may have more effect (Japanese love to sock)
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Old 26th February 2011, 10:48 AM   #1480
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Hi Liliya,

I will put that into my to-do list for the next version (if there is any) of pcb. But for this version, you will just have to "cross you legs" with shrinking tubes. Maybe I am too naive to see the problem.
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