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I looked into the PA I damaged when a faulty key put the radio in transmit: - One of the parasitic choke leads popped out of the resistor. - One of the 1-watt cathode resistors is cracked and both

Looks like reasonable stuff. Will have the advantage over fiberglas that it won't get into your fingers. Fiberlas should be handled with fairly heavy gloves and a dust mask. Most hardware stores have

I have commented in this and other lists about the speakers sold for communication receivers. I won't repeat everything here. The technology to make a better speaker is not new in any way and can be

I have a 4NB noise blanker that Ron, WB4HFN said he was unable to repair due to parts availability. Is there anyone who repairs them? Thanks & 73 Jay W6CJ

Yup…One and the same, albeit a wee (sic) bit cheaper at your store Joe – W7RKN From: [email protected] [mailto:[email protected]] On Behalf Of n4buq via groups.io Subject: Re:

Is this the same product? [ https://www.parts-express.com/Acousta-Stuf-Polyfill-1-lb.-Bag-260-317?quantity=1 | https://www.parts-express.com/Acousta-Stuf-Polyfill-1-lb.-Bag-260-317?quantity=1 ] Barry

I stuffed both of my Drake speaker boxes with speaker 'wool' found at Amazon. (Acousta-Stuf Polyfill Speaker Cabinet Sound Damping Material 1 lb. Bag) Worked very well. A little pricy, but, isn't most

I thought that the AF pot didn't go all the way to zero. Back in the day, it would have been easy to sub a different pot set. I like the idea of the RF gain and can't for the life of me understand why

Jerry, When I sold potentiometers with Stackpole Carbon Company, that issue is specified as “hop-off” and specified as a percentage of the resistance. When we sold them to Heath, Electrovoice,

One minor audio annoyance with the TR7 - the volume control doesn't go all the way to zero. Instead of a tradition voltage divider pot, they do something with the AGC. So to get the thing to quiet

Barry...indeed, check for correct idling current with *zero *drive. Adjust it using the bias control on the AC-4 power supply. You are aiming for about 70 mA (the "tick mark"). Also.....practice

I have seen loss of bias not only with a failed capacitor in the bias supply but also with dirty contacts in the Jones connector from the AC-4 to the transmitter. DeOxIt is a good cleaner for this.

How have you set your bias. That’s the first step. Pinned to the right is not a condition you want to be in for long so I would suggest not tuning up until you figure it out. ?I would verify that

I uploaded them here /g/DRAKE-RADIO/files/sherwood 73 Stan KM4HQE

Hi Floyd, My most recent post of the AMP-4 information was yesterday at 1:37 PM MST. For everyone’s convenience, attached to this email are PDFs for the following: AMP-4, FC-4, MIX-4, PD-4, RPS-4

Hi Rob.? Where did you post that stuff?? I've looked here in files and photos, at your website and on Mods.dk with no luck. 73, Floyd

GM all and HNY I have a T-4XC in great condition but is not acting normal. It puts out 110 watts, sounds great on CW and cooperates with my straight key. Unknown about the SSB side because I never

Floyd, I posted the AMP-4 instructions again yesterday. Includes the schematic. Rob, NC0B

a $50.00 box".' I don't think the issue is so much the MS4 speaker cone or magnet. There's essentially no baffle distance at even moderately low frequencies between the front and back of the cone.

I've been looking over documentation I've assembled on the Sherwood audio stage modification.? I have diagrams from the April 1979 HR article, from MODS.dk and from the files section here.? Since