[1000mp] MP Relays

[Ronald Long]

At 09:32 PM 5/20/02 +0000, you wrote:

>Yep - at least on the HPF board the 8 relays are all Matsushita 
>HD1-M-DC12V parts.  Anyone know of a small quantity supplier of Matsushita 
>relays other than going to Yaesu?   I looked in my Mouser and Digi-Key 
>catalogs and Matsushita wasn't listed in their relay product offerings.

For what its worth:

Searching around the web I find this Matsushita relay catalog for Series HD
http://www.itpindia.com/pdf/mew_relays_series_hd.pdf

It is poor quality as pdf documents go but is readable. At least this gives 
some info that might be used to find a substitute. It says gold-clad 
bifurcated contacts, sealed unit. So it is not a cheap relay.

Does anyone know if the HD relays are also used in the Mark V 200W radio? I 
suspect that relay problems are pretty infrequent but nevertheless I 
suspect a subject of some interest to the group.

At another site http://www.vcnet.com/measures/perfect.amp.html

I found this interesting item (but I think this NR reed relay is a 
different animal).

"A conventional relay switches in 15mS to 25mS - doing so in a somewhat 
stentorian manner. Such relays have traditionally been used for RF and bias 
switching in HF amplifiers. This was acceptable when transceivers also used 
conventional relays. Currently manufactured transceivers are designed for 
AMTOR, QSK-telegraphy, and reasonably quiet SSB-VOX operation. Such 
transceivers switch quickly and quietly. Nipponese transceivers often use a 
Matsushita [Panasonic] NR-HD-12V reed relay to switch the RF output. 
Provided that the SWR isn't ridiculous, this relay can dependably switch 
150W of RF. It works well in an HF amplifier when it is used to switch the 
input RF signal. This relay is available in the U.S. as a spare part for 
Kenwood and Yaesu radios. Yaesu's price is reportedly cheaper than 
Trio-Kenwood's."

ron w8gus.