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Still working on trying to cleanup the noise in my SSB mode signal.? I found one bad .001 cap in the audio chain before the balanced modulators with Walt's advice.? But, that didn't fix my noise

I have committed on the purchase of the HT-9. I also bought the 20m tuning unit that was available online. Thanks to those of you that pointed me to this item! I’m not sure how much AM activity

DonToo much is attributed to ESR in boat anchor radio power supplies.? It is a red herring from my point of view.?? If a low ESR capacitor was not specified in the radio's part list than just how

Sent to wrong address by mistake Sri guys wrote:

This is the FOURTH cap I have received for this radio. Not one of them are the same. This is the only new broadcast type cap still made today.? It's smaller. It says 600 vac.? 400pf a section or so.

Hi Jim, I am behind and trying to catch-up, and you triggered my latent thoughts about ESR stuff As regards the previous comments about one or the other, it seems to me the “better” or the

"Just a metal can with regular caps stuck inside", this is exactly what can caps always were. The can may have been filled with wax but were nothing special. Now, there are caps in metal cases that

I started going through the alignments on this radio and the 1650 KHz IF alignments went great but on the 20.15 MHz alignment things got somewhat strange.? I was unable to get a "tone" out of the

Dan Spot on! This is exactly how I did it with the two SX-100s I rejuvenated, BR d

Thats awesome. Thank you, John. I will have to mount the cap and take measurements. I have a 4th cap on the way and my fingers are crossed this time. I will report back! C

On one of my 2000s the Can cap was shorted.? I had no choice but to install two caps under the chassis.? I used some amazon Chinese 47MFD 450 volt caps I had on hand.? I was a bit nervous and just

Hi Jim, I won't notice the difference in temp rise because I'm not monitoring the temp of the caps. ESR is just another one of those specs that some folks, not me, care about perhaps because it's just

Another factor for doubters to consider.? Materials, manufacturing and underlying technology in general have made it easier to build better caps than 50 years ago.? I'm not saying that some of the

Agreed Jeff, this is also my understanding.?? I'm confident that at hallicrafters, unit price was at least equal to performance if not the primary goal.? Government contracts required high

DaveThat is true, today's vendors publish this data but if it was indeed important to the design, hallicrafters would have added this data to the parts list.? The only description I find in a

The esr for the original caps came from vintage catalog search of what was printed on the original caps. That was probably 10 to 15 years ago. I went to the site and found that they do not quote esr

WaltWent to the web address?http://www.tubesandmore.com and searched for?C-EC50-50-500CE.? I did not find any info on ESR for this cap.? Where did you find the 1.5 ohm spec?Regards,Jim Logic:

One of the issues for me is that electrolytics keep getting smaller and start to look ridiculous in vintage equipment especially above the chassis. Ian N6UH wrote:

Another way of stating ESR is D or dissipation factor. D is 1/Q and is commonly used for capacitors. Any capacitance bridge will measure D. ESR is relatively high for electrolytic caps and low for

Hi, Some vendors do list ESR. MOUSER