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<div>Thanks everyone. I ordered a few 7805 fixed regulators from the auction site. $2. Hopefully it gets to me in the usual 21 days. The application is an old amplified Bazooka tube. The output specs are relatively low, so if the parts don't work, I am positive I can get one of the generic $12-$15 amp boards to drive the single woofer in the tube. I will not pay $99-$125 for a replacement amp. </div><div><br></div><div>@Pat, yeah, I ordered similar micro farad replacement cap as the one next to it and I did that before I posted. If it blows up the replacement, then I will go with the higher voltage, but the limit to spend is $5 in parts. After that, I'll go with an amp board. </div><div><br></div><div>Brian</div><div><br></div><div><br></div><div><br></div>
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On Sunday, February 24, 2019, 9:08:04 PM EST, DAVID MASSEY <dave1massey@cs.com> wrote:
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<div><div id="ydpe4f19b95yiv1975092301"><div><p dir="ltr">Actally, you can make it an adjustable regulator but if you are going to order something you may as well get a 317 which is designed for this. Plus the data sheet will give you hints on how to do this.</p>
<p dir="ltr">Dave</p>
<div class="ydpe4f19b95yiv1975092301device_aol_et_org_dt_dd_quote"></div><hr style="border:0;min-height:1px;color:#999;background-color:#999;width:100%;margin:0 0 9px 0;padding:0;"><span style="font-size:14px;color:#999999;">On Sunday, February 24, 2019 John Innis via Shop-talk <<span style="color:#0000A0;">jdinnis@gmail.com</span>> wrote:</span><br clear="none"><div id="ydpe4f19b95yiv1975092301"></div></div><div class="ydpe4f19b95yiv1975092301yqt1433443853" id="ydpe4f19b95yiv1975092301yqt90708"><div><div><div dir="ltr">A 7805 is a fixed regulator. There are other parts in the linear SERIES that are variable output, but if it has a 7805 part number, it will always output a fixed 5v. <br clear="none"></div><br clear="none"><div class="ydpe4f19b95yiv1975092301gmail_quote"><div class="ydpe4f19b95yiv1975092301yqt2218788159" id="ydpe4f19b95yiv1975092301yqt02989"><div class="ydpe4f19b95yiv1975092301gmail_attr" dir="ltr">On Sat, Feb 23, 2019 at 10:08 AM Battmain via Shop-talk <<a shape="rect" href="mailto:shop-talk@autox.team.net" rel="nofollow" target="_blank">shop-talk@autox.team.net</a>> wrote:<br clear="none"></div><blockquote class="ydpe4f19b95yiv1975092301gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp65bf8037yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div></div>
<div>Could I use *any* MC7805CT as a replacement, as the first link shows different models of that regulator? Some models of the regulator have variable output as listed in the second link. I suspect the output should stay constant for power, but since the amp output section has the pot on it, was wondering if I should go with the adjustable output regulator or just stick with a fixed output?</div><div><br clear="none"></div><div><br clear="none"></div><div>Brian</div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div>
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On Saturday, February 23, 2019, 9:37:17 AM EST, Pat Horne <<a shape="rect" href="mailto:patintexas@icloud.com" rel="nofollow" target="_blank">patintexas@icloud.com</a>> wrote:
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<div><div id="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354"><div>This chip is a voltage regulator, not the audio amplifier. The part number indicates that it is a 5v fixed regulator. <div><br clear="none"></div><div>Peace, </div><div>Pat<br clear="none"><br clear="none"><div dir="ltr" id="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354AppleMailSignature">Pat Horne <div>We support Habitat for Humanity</div><div><br clear="none"></div></div><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354yqt0494001998" id="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354yqt20296"><div dir="ltr"><br clear="none">On Feb 23, 2019, at 7:35 AM, Battmain via Shop-talk <<a shape="rect" href="mailto:shop-talk@autox.team.net" rel="nofollow" target="_blank">shop-talk@autox.team.net</a>> wrote:<br clear="none"><br clear="none"></div><div dir="ltr"><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp2bbfaeyahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div></div>
<div>I did look up that model, however, here is an example from this site...</div><div><a shape="rect" class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354enhancr_card_1328980195" href="http://www.alldatasheet.com/view.jsp?Searchword=MC7805CT" rel="nofollow" target="_blank">MC7805CT Datasheet, PDF - Alldatasheet</a><br clear="none"></div><div><br clear="none"></div><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebyahoo-link-enhancr-card ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebymail-preserve-class ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebymail-preserve-style" id="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebenhancr_card_1328980195" style="max-width:400px;font-family:Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif;"><a shape="rect" class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebyahoo-enhancr-cardlink" href="http://www.alldatasheet.com/view.jsp?Searchword=MC7805CT" style="text-decoration:none;color:rgb(0,0,0);" rel="nofollow" target="_blank"><table class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-wrapper ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebyahoo-ignore-table" style="max-width:400px;" cellspacing="0" cellpadding="0" border="0"><tbody><tr><td colspan="1" rowspan="1" width="400"><table class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebyahoo-ignore-table" style="max-width:400px;border-width:1px;border-style:solid;border-color:rgb(224,228,233);border-radius:2px;" width="100%" cellspacing="0" cellpadding="0" border="0"><tbody><tr><td colspan="1" rowspan="1" valign="top" class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-primary-image-cell" style="background-color:rgb(0,0,0);background-size:cover;border-radius:2px 2px 0px 0px;min-height:175px;" height="175" bgcolor="#000000"><table class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-overlay-container-table ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebyahoo-ignore-table" style="width:100%;" cellspacing="0" cellpadding="0" border="0"><tbody><tr><td colspan="1" rowspan="1" valign="top" class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-overlay-cell" style="background-color:transparent;border-radius:2px 2px 0px 0px;min-height:175px;" bgcolor="transparent"><table class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebyahoo-ignore-table" style="width:100%;min-height:175px;" height="175" border="0"><tbody><tr><td colspan="1" rowspan="1" class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-richInfo2" style="text-align:left;padding:15px 0px 0px 15px;vertical-align:top;"></td><td colspan="1" rowspan="1" class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-actions" style="text-align:right;padding:15px 15px 0px 0px;vertical-align:top;"><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-share-container"></div></td></tr></tbody></table></td></tr></tbody></table></td></tr><tr><td colspan="1" rowspan="1"><table align="center" class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-info ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebyahoo-ignore-table" style="background-image: none; background-size: initial; background-attachment: scroll; background-origin: initial; background-clip: initial; background-color: rgb(255, 255, 255); width: 100%; max-width: 400px; border-radius: 0px 0px 2px 2px; border-top: 1px solid rgb(224, 228, 233);" cellspacing="0" cellpadding="0" border="0"><tbody><tr><td colspan="1" rowspan="1" style="background-color:rgb(255,255,255);padding:16px 0px 16px 12px;vertical-align:top;border-radius:0px 0px 0px 2px;"></td><td colspan="1" rowspan="1" style="vertical-align:middle;padding:12px 24px 16px 12px;width:99%;font-family:Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif;border-radius:0px 0px 2px;"><h2 class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-title" style="font-size:14px;line-height:19px;margin:0px 0px 6px;font-family:Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif;color:rgb(38,40,42);">MC7805CT Datasheet, PDF - Alldatasheet</h2><p class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-richinfo-primary" style="font-size:12px;line-height:16px;margin:0px 0px 4px;color:rgb(151,155,167);">alldatasheet.com</p><p class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydp3e0f82ebcard-description" style="font-size:12px;line-height:16px;margin:0px;color:rgb(151,155,167);">MC7805CT Datasheet, MC7805CT PDF, MC7805CT Data sheet, MC7805CT manual, MC7805CT pdf, MC7805CT, datenblatt, Elec...</p></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table></a><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354loadingSpinnerContainer" style="width:100%;min-height:100%;"><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354D_F ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354F_n ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354gl_C ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ab_C ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354H_6MGW ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354o_h"><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354W_6MGW ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354H_6MGW ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354D_X ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ah_1PEzoz"></div></div></div></div><div><br clear="none"></div><div><br clear="none"></div><div>They list multiple models of that chip. The one I think is closest is...</div><div><a shape="rect" href="http://pdf1.alldatasheet.com/datasheet-pdf/view/82852/FAIRCHILD/MC7805CT.html" rel="nofollow" target="_blank">http://pdf1.alldatasheet.com/datasheet-pdf/view/82852/FAIRCHILD/MC7805CT.html</a><br clear="none"></div><div>because of the variable output. The amp does have level/volume pot on it. The other datasheets in the list do not show a variable output.</div><div><br clear="none"></div><div>Brian</div><div><br clear="none"></div><div><br clear="none"></div>
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On Saturday, February 23, 2019, 6:30:21 AM EST, Jeff Scarbrough <<a shape="rect" href="mailto:fishplate@gmail.com" rel="nofollow" target="_blank">fishplate@gmail.com</a>> wrote:
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<div><div dir="ltr">How about LM7805CT?<br clear="none"><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydpbf13efe9yqt8133710530" id="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydpbf13efe9yqtfd96835"><br clear="none">On Sat, Feb 23, 2019 at 2:16 AM Battmain via Shop-talk<br clear="none"><<a shape="rect" href="mailto:shop-talk@autox.team.net" rel="nofollow" target="_blank">shop-talk@autox.team.net</a>> wrote:<br clear="none">><br clear="none">> Finally got around to installing an amplified speaker I had sitting around for years. It was supposed to be a simple install, but looks like I fried something in the haste.<br clear="none">><br clear="none">> I already picked up the capacitor in the picture, but I think the regulator might be fried also based on the burn marks.Seems there are different models of that regulator. The amp is in a 12v application. Anybody have any ideas as to what model regulator it is? (or what I could substitute it with? Will be getting it from that auction site. :) )<br clear="none">> Picture in the link...(that's the best I could get) <a shape="rect" href="https://i.imgur.com/FIfJA4O.jpg" rel="nofollow" target="_blank">https://i.imgur.com/FIfJA4O.jpg</a><br clear="none">><br clear="none">> I figure if I throw $5 at it in parts, it wouldn't hurt to try.<br clear="none">><br clear="none">><br clear="none">> Brian</div><br clear="none">> _______________________________________________<br clear="none">><br clear="none">> <a shape="rect" href="mailto:Shop-talk@autox.team.net" rel="nofollow" target="_blank">Shop-talk@autox.team.net</a><br clear="none">> Donate: <a shape="rect" href="http://www.team.net/donate.html" rel="nofollow" target="_blank">http://www.team.net/donate.html</a><br clear="none">> Suggested annual donation $12.96<br clear="none">> Archive: <a shape="rect" href="http://www.team.net/pipermail/shop-talk" rel="nofollow" target="_blank">http://www.team.net/pipermail/shop-talk</a><br clear="none">><br clear="none">> Unsubscribe/Manage: <a shape="rect" href="http://autox.team.net/mailman/options/shop-talk/fishplate@gmail.com" rel="nofollow" target="_blank">http://autox.team.net/mailman/options/shop-talk/fishplate@gmail.com</a><div class="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydpbf13efe9yqt8133710530" id="ydpe4f19b95yiv1975092301gmail-m_4970131661470459166ydp4db1db92yiv6690341354ydpbf13efe9yqtfd59736"><br clear="none">></div></div></div>
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