Re: Replacement Male connector for 2BQ?
For the record, all I have is the connector itself and no backshell.? Thes are still available but I've forgotten where I bought mine (new) a few years ago.
Steve Wedge, W1ES
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
On Sunday, January 19th, 2025 at 11:31 AM, k3stx via groups.io <k3stx@...> wrote:
Thanks for the info on the Cinch connector. ?My “plug” that holds the pins in place lost its little clamp ears; I need the whole plug ( it just solder pin assembly. Any idea of the name of the connector that holds the 4 pin plug?
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I am looking for a replacement Blower Wheel for an L4B amplifier.? You can reply here or to my email address on QRZ.
73, Ron
ND4R
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Re: Replacement Male connector for 2BQ?
AFAIK 5AB2 is the designation of the 4 pin version. The added center pin for the 5 pin version may have been unique to the car stereo universe and I have never seen a separate number for that one or for a backside cap although I have seen rubber caps on autosound speaker harnesses. Maybe someone has an old Cinch catalog from that era. There is a 10-lot of the are plug assembly up on eBay right now. He calls it a battery plug. On Sun, 19 Jan 2025 08:31:37 -0800 "k3stx via groups.io" <k3stx@...> wrote: Thanks for the info on the Cinch connector. ?My “plug” that holds the pins in place lost its little clamp ears; I need the whole plug ( it just solder pin assembly. Any idea of the name of the connector that holds the 4 pin plug? -- 73 -Jim NU0C
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Re: Replacement Male connector for 2BQ?
Thanks for the info on the Cinch connector. ?My “plug” that holds the pins in place lost its little clamp ears; I need the whole plug ( it just solder pin assembly. Any idea of the name of the connector that holds the 4 pin plug?
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Re: Drake R-4B build quality question
On 2025-01-18 19:20, Gary Follett via groups.io wrote: knew a LOT about what Zenith products should look like and would not them pass tests) we would have been shown the door, that same day - no
two weeks notice! *** "The Quality goes In before the Name goes On". - Jerry, KF6VB
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Just in time for a 20 meter SSB QSO during “a winter’s night so cold”.
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Re: Drake R-4B build quality question
The Drake builds that I have seen have been very good. But having been both a line tech and a customer service tech at electronics manufacturers I can say that assemblers do have bad days, they often chit-chat amongst themselves too much, and mistakes happen. We were all under pressure to get stuff out the door and things get missed in hurried visual inspections. If it works to spec it hits the road. I once knew a fellow who did a full alignment on any new radio be bought because he knew they were often aligned to meet spec, not necessarily for best performance. I have also seen line "techs" who had no idea what they were doing. They were just following work instructions and if they ran into an unusual problem they did not have the skills to troubleshoot and repair it. Quality suffered. On Sat, 18 Jan 2025 17:47:04 -0800 "Dave W7GZ via groups.io" <w7gz@...> wrote: I got in a Drake R-4B (S/N 89xx) for repair this week that I consider to have quite poor build quality. I guess the assembler was having a bad day when he built this one. -- 73 -Jim NU0C
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Interesting video but his glitch diode configuration has me puzzled. He complains (rightly so) that the B- was returned to the chassis but connects a reversed diode pair in which one of the diodes returns the B- to the chassis? The glitch diode implementations I have seen use only a reverse biased diode from B- to chassis ground. Am I missing something? /g/DRAKE-RADIO/files/Glitch%20protection%20D_a_02.pdfAt any rate, it does look bad for Ron. The eHam reviews after 2022 are brutal. I hope he is doing OK. On Sat, 18 Jan 2025 22:52:15 -0800 "Jim VE7RF via groups.io" <jim.thom@...> wrote: Scott Mitchell? (KB!SEL)? owns? amprepairguy.com? ?and also Harbach Electronics.
Here is the L4B in question. -- 73 -Jim NU0C
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Re: Replacement Male connector for 2BQ?
I believe I have some. ?Email me off list.?
Steve Wedge, W1ES
Time flies like an arrow. Fruit flies like a banana.
On Sun, Jan 19, 2025 at 9:13 AM, Jim Shorney via groups.io < jimNU0C@...> wrote:
The Cinch 5AB2 connector? Unless your original is broken it should be re-usable I would think. Wolf VK3WY may still have some.
/g/DRAKE-RADIO/message/32424
These were common in 1970s car stereo gear in four and five pin variants. Sometimes you can find vintage cable sets on eBay or at hamfests. The extra pin can be removed from the 5 pin variant.
On Sun, 19 Jan 2025 03:26:41 -0800
"k3stx via groups.io" <k3stx@...> wrote:
> Replacing the RG62 cable on my Drake 2BQ and I would like a replacement 4 pin male connector to mate with the female in my 2B. Any idea where I can get a replacement male connector?
>
> Paul K3STX
--
73
-Jim
NU0C
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Re: Replacement Male connector for 2BQ?
The Cinch 5AB2 connector? Unless your original is broken it should be re-usable I would think. Wolf VK3WY may still have some. /g/DRAKE-RADIO/message/32424These were common in 1970s car stereo gear in four and five pin variants. Sometimes you can find vintage cable sets on eBay or at hamfests. The extra pin can be removed from the 5 pin variant. On Sun, 19 Jan 2025 03:26:41 -0800 "k3stx via groups.io" <k3stx@...> wrote: Replacing the RG62 cable on my Drake 2BQ and I would like a replacement 4 pin male connector to mate with the female in my 2B. Any idea where I can get a replacement male connector?
Paul K3STX -- 73 -Jim NU0C
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Replacement Male connector for 2BQ?
Replacing the RG62 cable on my Drake 2BQ and I would like a replacement 4 pin male connector to mate with the female in my 2B. Any idea where I can get a replacement male connector?
?
Paul K3STX
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Scott Mitchell? (KB!SEL)? owns? amprepairguy.com? ?and also Harbach Electronics.?
Here is the L4B in question.?
He has 448 video's on there of repaired amps from various? amp manufactures.? ?
The playlist has different amps in their own categories.?
?
Here is the main url for his amprepairguy.com site.? ?
He bought out Harbach last spring.? ?
Later.... Jim? ?VE7RF
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Re: TR7 - Early version 2nd Mixer Schematic and Pictorial Information (description of parts on the board)
Many thanks Jim. I will proceed based on the information I have. Hope you are doing fine.
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73 de Raoul, CE3RY
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Re: Drake R-4B build quality question
I have found unsoldered wires a couple of times in old General Radio instruments. Same thing, wrapped but never soldered. Evidently worked well enough to get through QC and work for many years.
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On 1/18/2025 7:20 PM, Gary Follett via groups.io wrote: I have never seen a poorly built Drake radio.
However, I had an interesting build quality issue in a 1951 Philco TV set. I did a full recap job on it but still no high voltage. It did not take me too long to determine that the wire from the cathode pin of the horizontal output tube was properly inserted, bent around the pin, cut but never soldered. It had been this way for over 50 years without having been previously discovered!
This must have been the ubiquitous “hit-it-in-the-side-real-hard to make it work" set.
Philco, at the time, was well regarded for design and build quality. It just shows that a few things slip by even the best of them…
I still don’t know why the QC folks at Drake did not catch this beast to which you refer. When I was at Zenith Radio, a very long time ago, repairing radios and stereo amplifiers on the line, I was always overseen by a QC manager who, while he knew little about electronics, knew a LOT about what Zenith products should look like and would not pass anything that did not look up-to-snuff. In fact, if I, or any other tech presented a significant number of nasty looking or poorly working sets for inspection, (or with unapproved modifications to make them pass tests) we would have been shown the door, that same day - no two weeks notice!
Gary
W0DVN
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Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
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Re: TR-7 Odd 40M Parasitic
Both Drake and TenTec had an amazing number of added grounds (the PTO for example) added to solve problems as they presented themselves. TenTec even applied double sided acrylic foam tape to various parts of the bottom covers on Omni V and Omni VI radios to eliminate undesired ground paths and these alterations generally improved the radios a lot as they progressed through their life cycles.?
At least they did do the improvements as they saw a need - some radio makers failed to do so, most notably Kenwood with the infamous VCO vibration damping glue on the TS-430 and TS-440 (and likely others) that ate away the PC board connections rendering the radios useless…
TenTec had some real build quality bombs too, like the Paragon and Paragon II.
Gary
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On Jan 18, 2025, at 6:57?PM, Craig W8CS via groups.io <craig_severson@...> wrote:
Outstanding. Thanks as always, Jim.?
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Craig/W8CS
Greenville, SC
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Re: Drake R-4B build quality question
I have never seen a poorly built Drake radio.
However, I had an interesting build quality issue in a 1951 Philco TV set. I did a full recap job on it but still no high voltage. It did not take me too long to determine that the wire from the cathode pin of the horizontal output tube was properly inserted, bent around the pin, cut but never soldered. It had been this way for over 50 years without having been previously discovered!
This must have been the ubiquitous “hit-it-in-the-side-real-hard to make it work" set.
Philco, at the time, was well regarded for design and build quality. It just shows that a few things slip by even the best of them…
I still don’t know why the QC folks at Drake did not catch this beast to which you refer. When I was at Zenith Radio, a very long time ago, repairing radios and stereo amplifiers on the line, I was always overseen by a QC manager who, while he knew little about electronics, knew a LOT about what Zenith products should look like and would not pass anything that did not look up-to-snuff. In fact, if I, or any other tech presented a significant number of nasty looking or poorly working sets for inspection, (or with unapproved modifications to make them pass tests) we would have been shown the door, that same day - no two weeks notice!
Gary
W0DVN
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On Jan 18, 2025, at 7:47?PM, Dave W7GZ via groups.io <w7gz@...> wrote:
I got in a Drake R-4B (S/N 89xx) for repair this week that I consider to have quite poor build quality. I guess the assembler was having a bad day when he built this one.
?
I have found, so far:
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1) unclipped full length component leads poking out of a circuit board, hanging in the air
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2) a trimpot that was barely inserted far enough to reach the board pads
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3) generally poor soldering, from way too much solder on most joints to at least one barely soldered joint on a component (this was probably the cause of the complaint)
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4) jumper wires to the IF transformers almost touching the chassis or each other
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I'm still going through it, but I thought I would ask, Has anyone else has seen a radio that is not up to the usual Drake standard of excellence?
?
Dave
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Drake R-4B build quality question
I got in a Drake R-4B (S/N 89xx) for repair this week that I consider to have quite poor build quality. I guess the assembler was having a bad day when he built this one.
?
I have found, so far:
?
1) unclipped full length component leads poking out of a circuit board, hanging in the air
?
2) a trimpot that was barely inserted far enough to reach the board pads
?
3) generally poor soldering, from way too much solder on most joints to at least one barely soldered joint on a component (this was probably the cause of the complaint)
?
4) jumper wires to the IF transformers almost touching the chassis or each other
?
I'm still going through it, but I thought I would ask, Has anyone else has seen a radio that is not up to the usual Drake standard of excellence?
?
Dave
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Re: List of Restorers/repairers? ??
? ? ?Jim Warner WA9Z in Exline, IA is one of the best all around techs and he’s as honest as they come. If you find a good one it doesn’t matter where he is. Once you hand it to the shipper distance is irrelevant.?
Tony - W9JXN?
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On Jan 18, 2025, at 5:20?PM, Jay W6CJ via groups.io <lastradioman@...> wrote:
? Group, Please post the contact info for Gary W0DVN, Scott? (??) and any others who repair/restore Drake? (or other vintage gear)
Thanks & 73 from the LA dystopia? ??? Jay W6CJ
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Re: TR-7 Odd 40M Parasitic
Outstanding. Thanks as always, Jim.?
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Craig/W8CS
Greenville, SC
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Re: TR-7 Odd 40M Parasitic
Some TR7s are prone to instability on 40 Meters. It will often show up with a reactive load but not on a dummy load. I chased this issue for years with different rigs. The conventional fix of "turn it down to 100 Watts" was not acceptable to me. Several fixes were tried with varying degrees of success but it always came back. The final fix turned out to be the addition of a ground strap from the upper right rear corner of the High Pass Filter module to a convenient empty screw hole on the adjacent chassis divider wall. It was almost like Drake had provided for a ground strap there similar to the straps on the Low Pass module but did not include it. This fix has been stable for several years on two different rigs that I have abused over that time. When you look at all the different "stuff" connected to the HPF module and ALC board it kind of makes sense that this spot could be a possible nexus for common mode feedback. On Sat, 18 Jan 2025 16:10:50 -0800 "Craig W8CS via groups.io" <craig_severson@...> wrote: Welp...I fixed the symptom but don't know what the actual problem is.
I bypassed my MN2700 tuner and ran the ladder line to my little MFJ Versa-Tuner II (that I can't seem to get rid of) and I can tune to full power with no issues.
I'll have to dig into the MN2700 and see what's living inside of it that's resonant at 7MHz.
cheers
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Craig/W8CS
Greenville, SC -- 73 -Jim NU0C
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Jim Shorney
Craig W8CS
