RE: [drakelist] TR7 Volume
On Wed, 28 Jan 2004 19:08:40 -0500 (EST), Ron Wagner wrote: > >What I have done is use an outboard Radio-Shack DSP for my audio control. >It does two things, one allow me to turn the volume to "nothing", and also >allows a very nice way to drop out the old tuner-uppers. Yep, works good for that too. Where I liked it was listening to RS15 passes low on the horizon, with headphones on and the volume cranked. It made listening much easier. Not bad at all for a cheapo DSP. -- Jim Shorney -->.<--Put complaints in this box jshorney (at) inebraska.com nu0c (at) amsat.org Ham Radio NU0C Lincoln, NE, USA EN10ps http://incolor.inetnebr.com/jshorney/ -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] TR7 Volume
Gerry wrote: The ON/OFF switch ganged with the volume control was very common at the time. I can't fault the Drake engineers for following what was common practice. Besides we don't know what kind of pressure they may have been put under to follow the dictates of the owners or the accountants. In my 34 years of experience in Electronics Engineering I have often found that good engineering practice gets tossed by the wayside if there is a chance of saving a few cents worth of material. Of course that translates to lower selling price and more profits and money for you know who. Hint: it's not the engineers. With regards to the audio problem, I was able to reduce it considerably by rerouting the volume control to just ahead of the LM380 input. The downside is it involves cutting some traces and adding jumpers. Additionally, AM audio level is not as loud. It all comes down to what you can live with I guess. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Shorney Sent: Tuesday, January 27, 2004 5:37 PM To: [EMAIL PROTECTED] Subject: Re: [drakelist] TR7 Volume On Tue, 27 Jan 2004 08:44:44 -0500, Garey Barrell wrote: Only way to fix it that I know of is to take the switch off the control! What were they thinking!?!? Actually, in the commercial radio biz, that's a feature, not a bug. Keeps dispatchers from turning the volume clean off... Gerry - Certainly valid point re: how "engineering" decisions are not always the final word! :-) However, Drake (and most other manufacturers, including Collins) did NOT put the AC power switch on the receiver's AF Gain control. I guess the shortage of panel space on the transceivers forced them into it. The Drake 1-A got around the problem by using a push-pull switch on the AF Gain control!! I just back off the RF Gain on the TR-7 to turn it "all the way down". 73, Garey - K4OAH Atlanta -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
RE: [drakelist] TR7 Volume
What I have done is use an outboard Radio-Shack DSP for my audio control. It does two things, one allow me to turn the volume to "nothing", and also allows a very nice way to drop out the old tuner-uppers. I often hear net control mention the carriers, and when I turn off the DSP I hear it, but with it on, I hear only the conversation. That is of course if the front end and AGC are not pushed into "limiting" from the carrier. Drawback is getting acustom to using the DSP vloume control instead of reaching for the Drake on/off/volume control. Just my $.02 73, Ron -- Visit my astronomy home page. http://www.dma.org/~wagner Amateur Radio Station: WD8SBB - Ron and KB8NRP - Joann -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
RE: [drakelist] TR7 Volume
On Wed, 28 Jan 2004 17:00:04 -0500, Gerry wrote: >With regards to the audio problem, I was able to reduce it >considerably by rerouting the volume control to just ahead of the LM380 >input. The downside is it involves cutting some traces and adding jumpers. >Additionally, AM audio level is not as loud. It all comes down to what you >can live with I guess. It never bothered me all that much, actually. And since I started working for a company that makes dispatch consoles, I've learned that most of them have presets (harware or software, depending on the vintage) to set a minimum volume level for the reasons I mentioned. So now I tend to view it more as a "feature". Another way around the problem is to use some external gizmo like an amplified speaker, DSP unit, or the like, that has a volume control. I had one of the RadShack DSP units on my TR7 for a long time, it also worked well to reduce the high-frequency hiss in the audio when I was doing 10-meter satellite work. I'll probably hook it back up when I get the new shack finished. -- Jim Shorney -->.<--Put complaints in this box jshorney (at) inebraska.com nu0c (at) amsat.org Ham Radio NU0C Lincoln, NE, USA EN10ps http://incolor.inetnebr.com/jshorney/ -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
RE: [drakelist] TR7 Volume
The ON/OFF switch ganged with the volume control was very common at the time. I can't fault the Drake engineers for following what was common practice. Besides we don't know what kind of pressure they may have been put under to follow the dictates of the owners or the accountants. In my 34 years of experience in Electronics Engineering I have often found that good engineering practice gets tossed by the wayside if there is a chance of saving a few cents worth of material. Of course that translates to lower selling price and more profits and money for you know who. Hint: it's not the engineers. With regards to the audio problem, I was able to reduce it considerably by rerouting the volume control to just ahead of the LM380 input. The downside is it involves cutting some traces and adding jumpers. Additionally, AM audio level is not as loud. It all comes down to what you can live with I guess. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Shorney Sent: Tuesday, January 27, 2004 5:37 PM To: [EMAIL PROTECTED] Subject: Re: [drakelist] TR7 Volume On Tue, 27 Jan 2004 08:44:44 -0500, Garey Barrell wrote: >Only way to fix it that I know of is to take the switch off the control! What >were they thinking!?!? Actually, in the commercial radio biz, that's a feature, not a bug. Keeps dispatchers from turning the volume clean off... -- Jim Shorney -->.<--Put complaints in this box jshorney (at) inebraska.com nu0c (at) amsat.org Ham Radio NU0C Lincoln, NE, USA EN10ps http://incolor.inetnebr.com/jshorney/ -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ -- -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] TR7 Volume
On Tue, 27 Jan 2004 08:44:44 -0500, Garey Barrell wrote: >Only way to fix it that I know of is to take the switch off the control! What >were they thinking!?!? Actually, in the commercial radio biz, that's a feature, not a bug. Keeps dispatchers from turning the volume clean off... -- Jim Shorney -->.<--Put complaints in this box jshorney (at) inebraska.com nu0c (at) amsat.org Ham Radio NU0C Lincoln, NE, USA EN10ps http://incolor.inetnebr.com/jshorney/ -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] TR7 Volume
Bill - Unfortunately, it's "normal". The problem is that pesky "on-off" switch. The pot can't get all the way to the ground end until the switch is tripped off. Good reason to put the Power switch on just about any control except the AF Gain. Only way to fix it that I know of is to take the switch off the control! What were they thinking!?!? 73, Garey - K4OAH Atlanta Bill Carpenter wrote: I just acquired a TR7 that works great except for the volume control. It won't reduce the volume all the way even when fully CCW and ready to engage the off switch. It appears to be a ganged volume/on-off switch. Anyone had this happen and if so, what's the fix? 73, Bill NZ0T -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] TR7 Volume
Hi Bill, Thats normal, mine does that too. Something about the value of the pot at max resistance doesnt silence the rig. Slightly annoying but eventually you get used to it. 73 Mark W0NCL
[drakelist] TR7 Volume
I just acquired a TR7 that works great except for the volume control. It won't reduce the volume all the way even when fully CCW and ready to engage the off switch. It appears to be a ganged volume/on-off switch. Anyone had this happen and if so, what's the fix? 73, Bill NZ0T
