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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

I’d go as far as to say that holds true for 95% of the OEM speakers. The Heathkit SB604 wasn’t much to write home about either Mike WB8VGE The Heathkitshop

IMO, the MS4 speaker has to be the worse speaker I have owned.? ?With the AC4 power supply installed in it, it doesn't leave much wiggle room for open cell foam and dynamat.? Replacing the driver

I took the easy way out on my yaesu xcvrs.......and used an external rack mount? Class A headphone amp. ( 200 mw per channel).? Simple Behringer 4 x channel Class A? headphone amp.? ?I use

Very true Jim. I am trying to confirm the VCO is off that far. [email protected]> wrote:

Did you alter the feedback network to roll off above the speech range? May of the reference designs built around these are for hi-fi bandwidth. "Bob Loving via groups.io"

Those are some strange readings you are seeing on your counter. Per the service manual the high VCO should free run at around 32 MHz. Operating range is 63.05 to 78.05 MHz. "Jim Harris via groups.io"

Yes Gary that does interest me a lot. We will talk about that and make a deal I hope. Many thanks for the offer. Jim VE1RB [email protected]> wrote:

Thank you for that info! You are 100% right about the MS-4 in stock form (its fidelity is pitiful though). I am more of an SWL type person, which is what motivated me to make changes to the MS-4. A

Thank you, Paul, for the extended explanation. Bob K9JU

You know, the VCO board in the TR7 is the same as the one in the R7. I happen to have a working R7 VCO board if this interests you. Gary W0DVN

Okay I will get it out and have a look see. Jim VE1RB [email protected]> wrote: