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With Cumbria Designs seemingly gone sadly, does anyone know if there is anyone making a similar device as the X-Lock anywhere? Kind Regards James MD0MDI

Ron: Curious exactly where you were checking for the PTO signal and the LO signal?? Those signals may not be getting to the cathode/grid of V-8 if the switch S-4 is in the wrong position ("VFO" is

I have been working on this R4B for awhile now. recapped and cleaned all switches. I verified good LO and PTO signals to the premixer with an oScope.. However V8, the premixer, is not doing its thing.

Like the others have said, the Drake NB was only designed for ignition noise for those that took these mobile. I added a pre-wired BHI DSP noise reduction inside my MS-4 cabinet.? I hid the on/off

I tried this on my R4B and found that while it worked it didn't make the NB any more effective on noise other than ignition noise. Ignition noise is rare these days, about the only time I hear it is

David, You can try a mod to permit an adjustment to the NB threshold, as per this suggestion: http://www.ing.unitn.it/~fontana/R4bmod.pdf This allows an adjustable threshold, as per the original R-4

What is needed are detailed specs on the radio before and after if TX use of the filter is planned. I don't see such information published anywhere. I am not saying that the filters are not good

Myself and Dale W4OP of PAR Eng.check his restore work .have used Frank's filters.they work and work well. I have them in C lines and TR7 lines.Frank has Sweeps of all his filters on the website.

Exactly! 73 -Jim NU0C "Jeff Herhold" <jrherhold@...> wrote:

Don’t expect miracles with the NB ! It works on some noise and some it just don’t care! I would eliminate all noise in and around house first! I run a Timewave dsp599 ( works on audio ) which

The Drake blanker is very effective...? Like Richard says it works great on ignition noise. Back in the day it made the difference between being able to hear a station or not. Now a days, there isn't

A final consideration, of course, is to ensure the filter center frequency is properly set in relation to the carrier frequency to make sure the lowest audio frequencies and opposite sideband are

Please disregard this message.? I posted to the wrong group. Thanks Ryan Scott

The following files have been uploaded to the Files area of the [email protected] group. * /Stan_Inventory.pdf ( /g/DRAKE-RADIO/files/Stan_Inventory.pdf ) *By:* Ryan Scott

I can talk about the R4B. The blanker works fine on ignition noise, which was what it was mostly designed for but does nothing for the grinding line noise that is much more common. I tested it using a

Hi I,ve been trying to use my r4a recently. The pulse noise has been strong, and the blanker does not seem to be helpful. IS the experience of others similar? 73s David N9pvf

I am using the Noble 2K8 filter on my R-4C for several months now and couldn't be happier. On SSB there is no fiddling on the BFO anymore to decide whether you want it sound optimal on the low or high

John, I too ordered from Frank, for the 2.8khz filter and couldn't be happier, I get Great Reports and the Audio I hear is Great! Actually sounds Better (too Me) than my FTDX5000. I also got the W2IHY

The same problem can arise with a DIN socket. Poking a piece of copper wire into each pin-socket in turn and using a hot iron quickly on a clean tag worked well. Michael 2E0IHW

I should stay out of this and will not comment on either posters statements. However I will add this: ?? The necessary bandwidth for speech and music transmission was studied in detail by Harvey