Re: [Repeater-Builder] Re: Motrac / Solid State Tubes
Nuvistors were also used in the IF of a APX-153 Doppler ground speed drift angle radar on P3B aircraft. Fred KF4QZN - Original Message - From: John J. Riddell Sent: Wednesday, March 24, 2004 8:37 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Motrac / Solid State Tubes These devices were sometimes called Fetron's. We used them in 43A carrierunits in the TelephoneCentral office in the early 70's to replace vacuum tubes.They were 7 pin devices in metal cans and one version as I recall workedwell asa replacement for a 6BH6 tube in the first IF of a GE progress linereceiver..(Hams are resourceful people).The nuvistor was a different device, it was found in TV tuners of that eraand was developed by RCA.John VE3AMZ Waterloo Ont.- Original Message - From: "nj902" [EMAIL PROTECTED]To: Repeater-Builder@yahoogroups.comSent: Tuesday, March 23, 2004 8:53 PMSubject: [Repeater-Builder] Re: Motrac / Solid State Tubes| Perhaps the device referred to is the Nuvistor?|| These were used in VHF applications. [e.g. 6CW4] They| are metal and don't look all that different from early transistors.| The size is similar also, the Nuvistor is 0.400" dia. and a TO-5 is| 0.335" diameter.||| Yahoo! Groups Links|Yahoo! Groups Links* To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/* To unsubscribe from this group, send an email to: [EMAIL PROTECTED]* Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Re: Motrac / Solid State Tubes
At 01:53 AM 3/24/2004 -, you wrote: These were used in VHF applications. [e.g. 6CW4] They are metal and don't look all that different from early transistors. The size is similar also, the Nuvistor is 0.400 dia. and a TO-5 is 0.335 diameter. ---Nuvistors were noticeable taller, not to mention the two metal tabs that extended below the base. Of course, they also got hot! But you make a good point. I dunno.. maybe it's time to put this thread to bed? Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Motrac / Solid State Tubes
Perhaps the device referred to is the Nuvistor? These were used in VHF applications. [e.g. 6CW4] They are metal and don't look all that different from early transistors. The size is similar also, the Nuvistor is 0.400 dia. and a TO-5 is 0.335 diameter. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Motrac / Solid State Tubes
Like the 6DS4? - Original Message - From: nj902 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, March 23, 2004 7:53 PM Subject: [Repeater-Builder] Re: Motrac / Solid State Tubes Perhaps the device referred to is the Nuvistor? These were used in VHF applications. [e.g. 6CW4] They are metal and don't look all that different from early transistors. The size is similar also, the Nuvistor is 0.400 dia. and a TO-5 is 0.335 diameter. Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Re: Motrac / Solid State Tubes
The 6DW4 Nuvistor was a vacuum tube in a metal case, filament, etc. RF amp used in TV tuner and Sonar FS23 CB Base radio. Seems like the solid state jobs replaced 12AT7, 6U8, etc. But I may be wrong, Steve NU5D Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Re: Motrac / Solid State Tubes
There was a brief moment in time in the mid 1970's that Teledyne made solid-state replacements for the 6AK5 and the 12AT7 called Fetrons; they were essentially high voltage depletion mode JFETs. The main customer was the phone company, and when they had replaced all their tubes, the business dried up. (I was at National Semiconductor at the time working on a similar device). I don't think this has anything at all to do with the Motrac radio. Bob Underwood AA6BT At 07:24 PM 3/23/04, you wrote: The 6DW4 Nuvistor was a vacuum tube in a metal case, filament, etc. RF amp used in TV tuner and Sonar FS23 CB Base radio. Seems like the solid state jobs replaced 12AT7, 6U8, etc. But I may be wrong, Steve NU5D Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Re: Motrac / Solid State Tubes
At 01:53 AM 3/24/04 +, you wrote: Perhaps the device referred to is the Nuvistor? These were used in VHF applications. [e.g. 6CW4] They are metal and don't look all that different from early transistors. The size is similar also, the Nuvistor is 0.400 dia. and a TO-5 is 0.335 diameter. Memories - My first VHF receiver was a 5-tube ACDC that I modded ... I yanked the mixer tube and replaced it with a pair of 6CW4s... a crystal oscillator / multiplier and a mixer. I made it work on K6MYKs AM repeater here in L.A Mike WA6ILQ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Motrac / Solid State Tubes
These devices were sometimes called Fetron's. We used them in 43A carrier units in the Telephone Central office in the early 70's to replace vacuum tubes. They were 7 pin devices in metal cans and one version as I recall worked well as a replacement for a 6BH6 tube in the first IF of a GE progress line receiver.. (Hams are resourceful people). The nuvistor was a different device, it was found in TV tuners of that era and was developed by RCA. John VE3AMZ Waterloo Ont. - Original Message - From: nj902 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, March 23, 2004 8:53 PM Subject: [Repeater-Builder] Re: Motrac / Solid State Tubes | Perhaps the device referred to is the Nuvistor? | | These were used in VHF applications. [e.g. 6CW4] They | are metal and don't look all that different from early transistors. | The size is similar also, the Nuvistor is 0.400 dia. and a TO-5 is | 0.335 diameter. | | | | | | | Yahoo! Groups Links | | | | | Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
