Yaesu FT-101 HF Transceiver Web Page
Presented by Fox Tango International.
Yaesu Musen Co. FT-101
(Yaesu Wireless Co.)
Miscellaneous FT-101 Components,
Power Connector replacement,
Relays and information for FT-101 A.M. modifications.
Jackson Brothers U.K. ball drive units
Jackson 6:1 Ball Drive Replacements see:
|Yaesu DC to DC power supply converter||PB1056||FT-101 VFO||FT-101 16 volt 0.15 amp lamps||Preselector T101, T102, T103||FT-101 Meter|
National AE3271, AE3171 ,
OMRON MH6P & Matsushita AE317160 Relays
You might be asking yourself just how much can be written about a couple of relays? A LOT! While RL2 antenna change over relay is still readily available, RL1 on the other hand is not and it is the HEART beat for switching voltage inside your FT-101. This relay has become the source of much discussion in the Fox Tango Yahoo forum and a source of grief for many an owner of an FT-101 as they have become very difficult to find. If you are willing to pay the price from Yaesu (Vertex Stnd.) in Anaheim California a replacement can be obtained from them directly. The Yaesu part number for this relay is (P/N M1090028) it's current price is $75 dollars from Yaesu of Anaheim! So a search continues for an economical replacement for RL1 in the USA.
RL1 (Left) the HEART of the FT-101 switching and RL2 (right) Antenna Transfer Relay
More then likely if you can't
read the name on the side of your relay it is made by NATIONAL.
It is written in Katakana which is a Japanese writing system for words that are not truly Japanese (Ex:マクドナルド MAKUDONARUDO- McDonald's) In this case it says NATIONAL as can be seen in the close up of RL1-micro photo by Fox Tango member Steven Peterson(KG6JEV/4)
The main relay used in the FT-101
series transceiver is a 6 pole, double pole,
double throw relay. The early relays had the National name in Katakana and the number AE3171 or AE3271
Some of Yaesu's other transceivers such as the Yaesu FT-620B came out with the identical style relay made by OMRON (Type MH6P) again 6 pole double pole double throw relay. The OMRON MH6P is also no longer available from OMRON, so save the dime on the phone call, I've tried.
Is there a suitable replacement for RL-1?
The subject of an RL-1 replacement keeps popping up on
the Yahoo forum. A possible replacement relay for RL1 is the Magnecraft
W67RCSX-12, so I took a chance and ordered one. The Magnecraft Relay looks
and fits perfectly in place of the original AE3271 and it is so close it's
amazing. Except there was one problem. The relay wiper contacts are 180 deg out
of phase with the original Yaesu relay. In other words what I found is although
the relay looked the same on paper at first glance. When I put the ohm meter on
the center wiper of the Magnecraft relay ohms out on the opposite side of the
relay where I expect it to when compared to the original AE-3271 (FT-101 RL-1.)
Can we make it work? When we look a the Magnecraft relay diagram as drawn in the MOUSER catalog we have a true representation from the bottom of the relay terminal arrangement. With slight modification to your transceiver, you would have to move all the outside wiring on RL-1 relay socket outer contacts from one side to the other side, much as if you were rotating tires on your automobile from left side to right side. The center wiper contacts can be left as they are. If you down load the OMRON MH6 series catalog I have provided, you will find on page 8 the contact terminal arrangement of the MH6P, which is the same as all previous listed Yaesu relays National AE3271, AE3171, OMRON MH6P and Matsushita AE317160 relays. The Omron catalog says the contact arrangement is a bottom view, but it's really a Top view of the relay looking down. Then compare this to the Magnecraft W67RCSX-12 from the mouser catalog page 1104 (Cat# 620 Jan 2005.) The Magnecraft relay is truly a bottom terminal arrangement with the contacts facing toward you on the bench. You can ohm the contacts and they are exactly as the Mouser catalog shows, yet it is so similar to that of the Yaesu relay it hurts!
If your into pain and want to try the Magnecraft relay,
the part number is a Magnecraft W67RCSX-12 (12vdc) it cost me $17.18 for this
lesson. The relay shows up on page 1104 of the mouser catalog or you can
research yourself on line at http://www.mouser.com
Mouser Part# 528-6710-12
Mfr's Part# W67RCSX-12 Magnecraft & Struthers-Dunn
Description: 6PDT industrial 12v relay
Download OMRON MH6 Catalog and Magnecraft relay data sheets here.
Looking to replace RL-1 in your FT-101,
don't feel like paying Yaesu $75 for a new relay from Japan?
This fix will allow you to do it with the more commonly available Magnecraft relay as noted above.
Thanks to Wayne Wilkes N4YI for working out the final kinks out of this long await modification!
Be sure you put a note inside of your FT-101 if you do this modification
so you don't try to put the old style relay back in place of RL-1.
N4YI Relay Fix for RL-1 It's here! (Zip File 4mb)
FT-101 Antenna Transfer Relay (T/R Relay)
RL2 is still economical and available.
The antenna T/R relay (RL-2) in the FT-101 transceiver originally an OMRON Type MX-2P. This exact part number is no longer available from OMRON in the MX series, however a suitable replacement can be had in using a similar type OMRON relay in the general purpose relay series MY series, see data sheets in pdf format below.
Original OMRON MX-2P data sheet (No longer available)
Use OMRON series MY series 12V DPDT relay (MY2Z in current OMRON stock)
FT-101 Antenna transfer relay Omron Type MX2P (Left)
Modified RL-2 (Right) (Old Yaesu Part # MX2P) Current Yaesu Part # M1190124.
Omron Replacement Part# MY2-DC12S (RL-2) Yaesu part costs approximately $6.50 USD and the Omron is $6.64 USD
While in Japan last November(2003)I bought a book written in Japanese called the New FT-101 maintenance guide. Even if you can not read any Japanese at all you know pictures are still worth a 1000 words. One KEY piece of information I learned from this book is that RL1 is still available, getting it in the United States remains a problem. MATSUSHITA makes a current version of this relay. The number is AE317160 as listed on page 165 of this guide. Making several attempts to find this relay made by Matsushita and I believe they have now merged with Panasonic, so this has also complicated ordering. Yaesu's original National AE3271, AE3171, OMRON's MH6P and the Matsushita's AE317160 are all (12 volt 6P DPDT) identical relays. (NOTE: The Matsushita part number is current as of 2004) the problem right now appears to be finding a source to get them in the United States at a reasonable price.
You can order the "NEW FT-101 MAINTENANCE GUIDE" from Amazon Japan. You can actually order it and have it sent to the United States for about $40 USD. The book itself is about $24 USD, shipping is not exactly cheap from Japan and it will cost you almost as much to ship the book as the book cost itself, so be prepared to spend about $40 USD. If you need help with the Japanese Web site, write the Fox Tango Web Maser.
As addressed many years ago in the FT-101 service manual
Ordering information from Mouser.com for 12 pin Cinch-Jones connector
Visit Http://www.Mouser.com or call 1-800-346-6873 for this connector.
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Carol L. Maher W4CLM
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