Re: [Drakelist] AC-3 vs AC-4
Steve, If I remember correctly, the finals in the TR3 are 12JB6's, not 6JB6's so not compatible with the T4(any). My memory isn't what it used to be, but that's what comes through the fog. There's also no cover over the top of the power supply. If you use the Heathkit Shop's board, download his special instructions for putting it in the AC3. 73, Don, WB5HAK ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] AC-3 vs AC-4
And based on the AC3, there is a test point which is normally tied to ground. When you lift it from ground, you measure voltage drop across a resistor. This voltage happens to directly relate to final current. This allows you to easily adjust the bias w/o trying to figure out how accurate the rig's meter is calibrated, etc. I modified my AC4R PCB to include a resistor etc. Sent the data to Wb4HFN. Don't think it was ever posted on his site. 73, Ron WD8SBB --- On Sat, 10/29/11, Jim Shorney wrote: > From: Jim Shorney > Subject: Re: [Drakelist] AC-3 vs AC-4 > To: "Drake List" > Date: Saturday, October 29, 2011, 8:14 PM > On Sat, 29 Oct 2011 20:04:23 -0400, > Steve Wedge wrote: > > >The main question is this: what's the major difference > between the AC-3 and the AC-4? Is it strictly the > parts locations and the absence of the VOX RLY connector? > > See the thread here: > > http://www.mail-archive.com/drakelist@zerobeat.net/msg04591.html > > 73 > > -Jim > > > -- > Ham Radio NU0C > Lincoln, Nebraska, U.S.S.A. > TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, > R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, > all the time! > > "Give a man a URL, and he will learn for an hour; teach him > to Google, and he will learn for a lifetime." > > HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ > http://incolor.inetnebr.com/jshorney > http://www.nebraskaghosts.org > > > > ___ > Drakelist mailing list > Drakelist@zerobeat.net > http://mailman.zerobeat.net/mailman/listinfo/drakelist > ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] AC-3 vs AC-4
TNX, Jim. Shoulda known someone else would've brought it up by now. I've just been given an AC-3; I assumed it would play with all the 4-line, so it's a nice gift indeed. The MS-3's a nice bonus. I'm thinking the TR-3 is a basket case, though. Definitely worth it if any of the tubes are good - especially the finals. Steve Wedge, W1ES/4 To be is to do - Socrates To do is to be - Plato Do be do be do. - Sinatra All my computers have my signature with various pearls of wisdom appended thereto. -- From: "Jim Shorney" Sent: Saturday, October 29, 2011 8:14 PM To: "Drake List" Subject: Re: [Drakelist] AC-3 vs AC-4 On Sat, 29 Oct 2011 20:04:23 -0400, Steve Wedge wrote: The main question is this: what's the major difference between the AC-3 and the AC-4? Is it strictly the parts locations and the absence of the VOX RLY connector? See the thread here: http://www.mail-archive.com/drakelist@zerobeat.net/msg04591.html 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! "Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime." HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] AC-3 vs AC-4
On Sat, 29 Oct 2011 20:04:23 -0400, Steve Wedge wrote: >The main question is this: what's the major difference between the AC-3 and >the AC-4? Is it strictly the parts locations and the absence of the VOX RLY >connector? See the thread here: http://www.mail-archive.com/drakelist@zerobeat.net/msg04591.html 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! "Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime." HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] AC-3 vs AC-4
I just acquired another small pile of Drake gear from a friend. He gave the rest to me in exchange for cleaning and aligning the T-4X and returning it with PS. Included with the gear was a TR-3 in pretty rough shape - not sure what I'll do with this aside from part it out. There are, however, two AC-3's (and a MS-3), so the whole deal is pretty good regardless (besides, he's my friend and has worked on some of my old Johnson stuff in years past). The main question is this: what's the major difference between the AC-3 and the AC-4? Is it strictly the parts locations and the absence of the VOX RLY connector? Enjoy Those Drakes... Steve Wedge, W1ES/4 To be is to do - Socrates To do is to be - Plato Do be do be do. - Sinatra All my computers have my signature with various pearls of wisdom appended thereto. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[drakelist] AC- 3 vs AC-4
I have an older model AC-3 I use on my Drake TR-4. Everything seems to work OK. Is there any reason to change to a AC-4 supply? Does it do anything better than the AC-3? Thanks WA0MYH Gary
