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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 I went to the site and found that they do not quote esr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

Unless you are working on a SPS, the ESR of a new cap from a reliable source (that means Digikey, etc, and not ebay), as it applies to use in a old tube rig, will be absolutely satisfactory.? And the

The original caps had and ESR of 1.5 ohms. You might try asking Hayseed what the ESR of their replacement is. From http://www.tubesandmore.com/ C-EC50-50-500CE CAPACITOR, ELECTROLYTIC, 50/50 ?F @ 500

Hi, I have been taught that the lowest ESR is the best value. Never questioned that guidance. I suppose you could call Hayseed and ask them about the ESR value of their caps. DIgiKey sells an

How does one know if the ESR is the "best value" when the actual filter capacitor ESR is not specified by either Hayseed, hallicrafters or any of the original capacitor suppliers?? I can see the need

I played around with this radio a bit today and have a couple of questions.? I injected a 25.1 MHz signal into the VFO input and was able to get about about 6 watts on modulation peaks and I was able

Dan This is one of the audio signal generators I am considering. I am thinking this should do it well. Has considerable range and levels adjust.

Nice looking craftsmanship. Here is a ham owned cap company that has been around for a long time and produces some of the best cap kits for our hobby. HayseedHamfes <https://hayseedhamfest.com/>t As

Thank you so much Dan. Yes I am figuring out that the audio generator is my weak link. It is just a hobbyist tool and not geared for the 50kc area needed to align these IFs. I am looking at something

I went a different route on mine and etched pc-boards. [cid:419369cc-27d7-41a2-9eca-7fbc9fa5fd78] Walt Cates, WD0GOF https://wd0gof.com/Hallicrafters A majority of acceptance is not proof of

Looks a nice job. I printed these in abs for my ps2000 . They use the capacitors suggested by Walt in his repair manual. Ian N6UH

This looks all new and aftermarket.? Wondering who did it.? Both my PS2000 have these. C

?Hi, Keith. You’re going to find it easier and more effective using a VTVM for peaking and nulling during most stages of alignment. Moving a DC flat line up or down on the graticle of a scope is

Clark, What is the offset distance between the two shafts, as precise as you can get. Vertical and horizontal I’m willing to try to machine from some plastic stock gears I have that was from some

Look at the entire video at the end of the video that very device exists. I was so amazed you can make anything these days.